Buick 401 vs 425 The 425 option was extended to the big Buicks in 64, as was 401/425 have the same stroke, blocks are the same for your purposes. The 401 was still Buick green. 00 Price. Testing the waters to see if there is some demand here for these. Posted May 13, 2001. 0122, 7am-10pm CST, everyday. Mahle Original Rear Main Seals JV742. That supports the idea of an internal 425 core cast with larger internal and external cylinder diameters. Thread starter sasbuick; Start date Oct 7, 2020; Tags 401 buick flexplate nailhead starter 1620 1962-1966 Buick 401 425 Nailhead water pump for AC cars. Plus, there were two different 425s. Interesting that the results would be totally opposite for Buick and Pontiac. Just gotta go find one that's relatively the same width. Agility Auto Parts Electric Fuel Pumps 4020102. 69), with the sizing of the secondaries being the same (1. 1966 was the last year for this engine design. 00. CURRENTLY PROVIDING BUICK, OLDSMOBILE AND PONTIAC PARTS FROM 1936-1979. Many customers have noted improved engine responsiveness and smoother operation after installation. The letters for the cubic inch displacement are the The difference between the 625cfm and 750cfm AFBs is the size of the primary throttle bores (625cfm >> 1. 040" compressed, depending on the manufacturer, & since they will fit ANYTHING from a 364 up to an over bored 425 the bore diameter starts at approx. Home; About Us; Gallery; My Account; Customer's Toy's ; Contact Us; Category. Some camshafts were slightly different, but otherwise not really noticeable. Very little corrosion, not weathered. Best oil & Filter for Nailhead 401 / 445? Thread starter Deleted member 28728; Start date Mar 23, 2021; D. 56", 750cfm >> 1. The Offy intakes don't perform all that well in 'as cast' form but can be made to perform decent with a little (or a lot) of port work. 425 Nailhead rocker arm oiling question. 231-252 V6 Forged Steel Connecting Rods. Toggle Nav. 5. The diff. from Full Throttle Ft. $150. He was told the heads were milled down so that the intake would fit. 250 less approx. Mahle Original Rear Main Sherman's 401 Buick Nailhead engine finally doesn't smoke. However, he says the ’53-’56 heads are different every year. Carbs were for 64-65 (info source Team Buick site). Mark This Forum Read View Parent Forum; Search Forum. Discussion in ''Da Nailhead' started by gs66, Jan 14, 2023. That's near where an original 401/425 from Buick would be as well, depending on manufacturing tolerances. ” From 1953 - 1966, the nailhead came in 264, 322, The block castings between 401/425 are the same in many instances. New posts My 70 ElÇamino with it's 300/350 Valve-piston clearance. item 2 Carter AFB 4-Barrel Carburetor Carb 3923s 1965 1966 Buick Nailhead 401 425 V-8 Carter AFB 4-Barrel Carburetor Carb 3923s 1965 1966 Buick Nailhead 401 425 V-8. Made In The USA. 65-66 ST400 switch-pitch cores are even scarcer. Cooling was best described as inadequate for these engines and Buick had trouble with them for years, along with upper cylinder head lubrication issues. DualQuadDave. Price: $645. (And yes, I did end that sentence in a preposition. 364 LOW PROFILE INTAKE Over the past 45 years I have had a couple of correct 1964 Riviera 425 air cleaners but I always keep reverting to the 401 cleaner. 90 1957-66 I would like to know if 401 heads from a 1964 Electra are the same as 425 cylinder heads from and Electra?Are the only differences between the two engines the block (bore and stroke) and the cam?? There were more variations of water pumps and one 1 posibily 2 will cause a leak at the timing cover, ealry 364 and 401's had different timing covers and a shorter section on pump, they look close, but one is about the width of the gasket short, as friend with a 60-401 pionted it out and it was orginally a long nose pump and he installed a On a 401 the head gasket is approx. Up for sale is a Rebuilt Fuel Pump. 00 Product ID: TA_3556. Small Nailhead 264/322 is also not the same as the bigger Nailhead 364/401/425. Price: Ad. By my first riv February 13, 2022 in Buick Riviera. I swapped the 364 out and put in a 401 from a 1960 Electra. F Oil Consumption - 1964 401 and 425 Cubic Inch Engines; OE Nailhead Cam Specs and Street Cam Selection Guide; Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today The first 9 key, Single Roller Timing Set for the 364-401-425 Buick Nailhead engines. I suppose that makes it a 401. Mark the bore is the difference between a 401 a 425 so pistons and Flywheel, 1964-66 Buick 401/425 Nailhead. Soon to swap out the dynaslush and enclosed driveline and put in a 65 Buick ST400 and GM 5x5 bolt pattern rearend. See listings near me. I am 99. Speedway Motors is a trusted Buick Nailhead 401 Starters source supported by racing and rodding experience since 1952 that other retailers just can’t . sometimes you can even score a tranny with them. is the 401 similar in performance to a small or large block chev/ford? i mean streetable not full race. The main assembly is shipped in 4 pieces to reduce the shipping costs. I think I will do some work on it this weekend. Although someone must have put the 465 decal on the air cleaner (meaning 425 ci) the block is marked JT647. com engine hardware store We have cylinder head bolts (as well as all types of engine fasteners) for gas and diesel engines. Quantity. Jump to content. 00 : Product ID: TA_V1630B-EAGLE. The only difference between Buick Oldsmobile/Pontiac is that the starters are on opposite sides, but most BOP bells have pockets on both sides. :TU: If you want more power go with a 425 maybe. $425. Super Wildcat engines were available in just depends on where you get them. 015"-. Most come with multiple bolt patterns for different clutch sizes. Discussion in 'The Bench' started by wildcatrivi, Apr 16, 2013. ESSENTIAL GUIDE: How to Avoid Scams Buick Riviera ; Best Oil Filter For 364,401 and 425 Nailheads Best Oil Filter For 364,401 and 425 Nailheads. Nicely detailed, they are one of the better looking old-school engines!! :bglasses: :TU: Find BUICK 6. for the better or Today on what’s it’s like, engine episode Wednesday Buick nailhead engine Family 322, 264, 364, 401, and 425 Loads of period ads and information Enjoy this 401 - 425 Nailhead Buick Mounting Brackets. ft of torque the engine develops. There is a LOT of material that 'can' be removed on the front right primary side where it turns to feed the runners for cylinders 1,4,6 and 7. Advanced Search. Brian the X codes were factory until late March, BUT you could still get them (duals) as a dealer installed optioned after, along with the aluminum finned valve covers. Were the heads on a 425 any better (or even different) than on a 401? -Brad In this episode I find out if the engine I just bought is a 425 or 401 nailhead Shop: https://www. 264/322 dec heights are the same as the stroke is 3. If you have this block you can build a 425. Nailhead: 264, 322, 364, 401, 425 . 8 out of 5 stars. Heads, block, crank, all the same. Request an Appointment. Discussion in 'Parts For Sale' started by DualQuadDave, Jun 17, 2021. will not fit Buick 350. The Buick red nailhead engine appeared in 1965. About Us; Delivery Information BUICK STREET PERF HYD ROLLER 401 OE specifications for the 1963 401 and 425 camshafts, Power to the Pavement! "Buick Trademark(s) used with the written permission of General Motors" These are a set of good performance cams for Buick Nailhead. Newer Carburetor on 1953-1963 Buick cars; Oil and Fluids; Suspension; Install Rubber Rear Main Seal; Alternator Conversion for pre-1961 Buick; 215-300-340 Tech Info; How to Install a Rope Seal Correctly; Fixing the Offenhauser NailheadinCA Buick Nut. Estimated Ship Date: TodayLoading Estimated Ship Date: Today. 875″ intake and a 1. $1,500 · In stock. 00 Product ID: TA_3413. ” All 1959-1966 364, 401 and 425 heads have the same ports and valve size; the 1957-’58 heads are the same with smaller valves. $19. Talk to the experts. 030". Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today; Home. By TheRev June 2, 2015 in Buick - Performance Hi, I have a nailhead 2x4 manifold with 2 original Carter AFB's (#3645 and #3646). 264-322 LOW PROFILE INTAKE. The Nailhead's replacements, the 400 and 430, ushered in Buick's entry to the muscle-car era. 364 is higher by . Both cars have been sitting, the resto'd one inside and the wildcat outside for 30 years, so the engines are stuck. Fits 1964–1966 Buick Riviera, 1964–1966 Buick Skylark, , , , , , . THIS PRODUCT HAS A MANDATORY $150 CORE FEE. brad54. $169. Intake manifold NOT included. Idles at 100. Mar 9, 2020 #1 I'm rebuilding a 401 This is a brand new complete engine gasket set for 364, 401, and 425 cubic inch Buick Nailhead Engines (1957 - 1966). so a stock 401 minus your cam and headers would be about 290 hp. Share I dropped the oil Allright!!!! Thanks for all the help on the Cubic Inch identification. 9%, Location: Montville, New Jersey, US, Ships to: WORLDWIDE, Item: 192701057256 REBUILT Fuel Pump 1966 Buick 401 425 V8 with Air Conditioning # 40250. 033"-. 264-322 Low Profile. Buick made four different 401 engines, three of which have different blocks. In 1966, Buick had a 225 cubic inch aluminum V8, a 300 cubic inch cast iron V8, and the 401 and 425 cubic inch “nailheads. Optimize your 1966 Buick 401/425 V8 with air conditioning using the Kanter Auto Fuel Pump FP40250. 979. 401-425 Intake. 530-272-1564 ©2021 by Nailhead Buick. O. Sep 28, 2016 #1 Hello everyone And the Buick chrome steel wheels are "Road Wheels" (or even Formula V) NOT Ralley wheels. 127 stroke of 3. with automatic trans in 401-425. By Riviman September 9, 2020 in Buick Riviera. Information . that will support a full dressed engine. I. Our most popular cam for the 401-425. I am choosing one for my '66 Riviera GS which is about to receive a fresh 425. They were advertised as 10. Otherwise you will be stuck with a 401 unless you sleeve it. <BR>"Fan of anything that Seller: old. 9% certain that internally it is untouched original Home. $39. 030" over 430 rings. The 445 stands for the lb. While not quite as good as the factory Pontiac dual quads, the Offy blows the Edelbrock away, by a bunch. The single roller timing chain features a 1/2 inch roller In reference to your other question - there is only one physical difference between a '65 and a '66 425. I am all for engine swaps my '48 Chevy Pu had a 401 mounted midship, IN THE CAB (16 inch drive shaft) for about ten years, you can't get any less practical than that!<BR>I would just put my effort into the rest of the 401= 4-1/16" bore 425= 4-3/16" bore Not much difference. Buick "detuned" the 425 single 4 barrel cam for `66 to obtain a smoother idle Rod bolt kit ARP BUICK 400-401-425-430-455. Thread starter Fruck; Start date Sep 28, 2016; F. 825 hp/ cubic inch 325 hp 401 cubic inches = . They must do something or Buick wouldn't have installed them. motors, and uses the smaller G. Quality of structural engineering? V-8 401* 4bbl JT V-8 425* 4bbl JW 1964 V-8 401* KT V-8 425* 4bbl KW V-8 425* 2X4bbl KX 1965 V-8 400(401)* GS LR V-8 401* LT not Buick Green. Thread starter kbalser; Start date Mar 9, 2020; K. They are what we used to call a locked secondary carb, the secondaries start to open just about the time you come off the idle circuit. While we're on the subject of 401/425's - is there a trick to removing the intake manifold from a 401/425 - I've already removed the 8 bolts (4 on each side) that hold the manifold to the head(s). Buick Rods and crank are steel with small mains. 0 out of 5 stars. 87GN@Tahoe Well-Known Member. Buick 401 425 nailhead valve covers the real deal not after market $375 plus shipping #buickriviera #nailhead #buick #buick425nailhead Buick 401 425 - Campbell Vintage Classic And GM parts My 71 was a 350 SBB car & since I owned numerous SBC’s over the years I still find the Buick stuff as a foreign language to what I’ve known my whole life. 25:1. 1196914! The body color is Turquois Mist Poly and the interior is Teal with Buick Mags on all four corners w After increasing displacement up to 401 and later 425 cubic inches, Buick phased out the Nailhead in 1967. I like the work ethic of starting with the easiest and Buick - General ; Valve Seals on 401/425? Valve Seals on 401/425? By Guest May 12, 2001 in Buick - General. Rebuild the 401 and bore it out . The intake has been blasted and is nice. 42 gearing in a GS make most of the difference? I'm interested in driving impressions from you folks who have experienced both. The last 3 digits will read 705. Details . Price: $495. They are a neat cabr but you have no adjustment on the secondaries. was being core shift in the blocks. D. item 3 USED 4 BARREL CARTER Buy Buick Valve Rocker Arm, Cylinder Head Related and Valve Train Parts, engine parts, ClassicBuicks. hi group, are the blocks the same on these nailheads or is the difference in the the stroke or heads. They have a round shaped bell housing unlike other GM transmissions. make sure there there is a adequate chamfer. $0. Larry POPPALUV66 said: In '66 The Nailhead went red. If you use the industry standard calculation for carb sizing, the 625cfm should be plenty big for a 400cid V-8 to make a good bit of horsepower. REBUILT. You are purchasing a pair of valve cover gaskets. Also perfect for that manual transmission transplant, or were required for dyno testing. Ship To: Tell a Friend About This Product Don't see what you're looking for? We probably have it! PLEASE call our Buick Wildcat 401 (1963-1966) Buick Electra 425 (1965-1970) Buick Riviera 455 (1966-1970) Buick Skylark 455 (1967-1972) Customer Reviews. with Switch Oil Consumption - 1964 401 and 425 Cubic Inch Engines; OE Nailhead Cam Specs and Street Cam Selection Guide; Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today Oil Consumption - 1964 401 and 425 Cubic Inch Engines; OE Nailhead Cam Specs and Street Cam Selection Guide; Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today He has three 63-64 Buick Riv's, one is in a semi resto'd condition, with a 401. Store vehicles in your garage to find the correct parts 1964-1965 Buick Riviera (WITH 401 V8 and 425 V8 Engine) AC Type 4706 Fuel Pump Rebuild Kit. 401" 4barrel 325hp. Show Threads Show Posts. Does your car have the original breather on it? If the breather decal is correct, it should say Wildcat 445 on it. This is a BEST brand gasket set. <P>-----<BR>[email protected]<BR>Life long Buick Fan. Curious what would be the recommended oil fill for a Buick 401 Nailhead engine with 98k miles. There are three different deck heights, and therefore three different intake manifold widths: Find BUICK 7. Yes, deck hight is more on the 401/425 than the 364. the easiest one to use on the 57-66 364-401-425. So RM suggested this slightly better than stock cam which he called a "425 Cam" and is supposedly the first level of camming beyond stock. Part Number: CCA-91-600-5. 401/425 is higher by . i just know iv only seen that figure for the 401. kbalser Member. Brand: Morel; Product Number: MMS 5333; 0 reviews / Write a review. The rings are the exactly the same/configuration. Yours is prob. A goal of 390 hp will take some work. Strong lower end. Share I believe the '66 401/425 used seals and that is what you use on the earlier engines. 20. 030 over making it like a 407 or 408. Ensure reliable fuel delivery for peak performance. 45 /pair. This timing set is also the ONLY roller timing chain set available for the Nailhead engines. In your item 2 Carter AFB 4-Barrel Carburetor Carb 3921s C5 1965 Buick Nailhead 401 425 V-8 Carter AFB 4-Barrel Carburetor Carb 3921s C5 1965 Buick Nailhead 401 425 V-8. Both edelbrock carbs are in good shape. With external balancing, the front main is left alone to handle the damper counterweight, same for the rear main & flywheel/flexplate's counterweight. Forums. The parts book dose not show any casting The 425 was the final evolution of Buick’s first V8, which started life in 1953 with 322 cubic inches and 188 hp. Have the same model as you. “Back in the day, hot rodders Find many great new & used options and get the best deals for 1963 1964 1965 1966 Buick 401 425 Dual 4X2 Carburetor Intake Manifold #B1357106L at the best online - Buick Cam Specifications for 401 and 425 nailheads - Buick Cams from Kenne Bell, 401, 425 - Nailhead Engine Specifications - Head Flow Chart Forum: Nailhead: 264, 322, 364, 401, 425. Member. No matter whether it's a 401 or a 425, the bigger thing is that it's a numbers matching car. The Buick Nailhead, Engine Specifications and Blueprinting General Specifications for the 1966 Buick 401 and 425 Cubic Inch Engines The following information has been directly complied from If it is a 401, it will have an R or a T for the second letter (T=most all 401s, R=specific code for the 401 in the '65 and '66 Skylark GS). Design ran out of room with '65 425, bore spacing. Part Number: SCE-171104. 5″ exhaust; both substantially smaller than the much smaller According to my GM Parts Book, the starter motor is Group 2. The letters for the years are sequential. The application is listed as 64-65 401 - 425 Engine. I read that, even know the heads can be swap from early block to late block, chambers. Noticable lope at idle. $119. Not Yet Reviewed. Free Shipping In The USA. Thread starter OrthoPro; Start date Jun 11, 2005; O. So about 4 out of every 5 cars are 401's. Canuck, May 14, 2009. but pretty sure all 401's only came with 10. Profile Page. Feedback from users highlights the quality and performance of the Howards Cams 91460 lifters. These high quality steel billet flywheels are an excellent replacement for 30 year old cast iron factory flywheels. 8:1 . Joined: Feb 9, 2009 Posts: 2,876. You are This is a brand new 4 barrel carburetor base gasket (spread bore) and stainless steel heat shield plate for 400, 401, 425, and 430 cubic inch Buick Engines from 1966 - 1967. Compressor & Bracket Kit - Buick - 401/425 Nailhead V8 - Center (A/C and Alternator Bracket) quantity. M. 1957-1966 Buick 364, 400, 401, 425 V8 Engine Head Gasket (1 Piece) Add to Cart. Deleted member 28728 Re: 401 vs 425 264 what about 3 x 2. 401's and 425' were painted green and the 65-66 were mostly painted red as also the 401's were too. Egg is bad about this. Buick - Performance and Modified ; 401/425 Crank Pulley 401/425 Crank Pulley. Part Number: CRT-M4553. 00 Product ID: TA_3412. 120 Buick Riviera ; Rebuilt 1964 425 cid Nailhead For Sale Rebuilt 1964 425 cid Nailhead For Sale. Ebay is more after shipping. At least the vin number on the motor matches the body tag. i. 364" W/4barrel 300hp. I feel this is a great guideline to determine what cams MIGHT fit without v-p clearance issues. I wouldn't worry about the bottom end of a Nailhead 401 vs 425 nailhead question. and i dunno about all years. wkillgs Gold Level See the 66 manual for std 401/425, and the 60 manual for the Dynaflow (same as 2x4) timing curves. The 64-65-66 401-425 came with an excellent automatic trans, the ST400. Here's an FYI for all you nailhead junkies. com/people/justagearheadFacebook: Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today; Home. I used to have a blisteringly quick 60 Invicta with the 401 that was purely ordered from the factory to race. Sticking with the one Find BUICK 7. so am going back to 310 hp with a 425 and 2x4 intake. . The threads going into the exhaust port will have to be tapped probably to the next larger size. are pretty much the same so where does the difference come from. Joined: Apr 11, 2008 Posts: 276. You will notice that the years span both engines, the 401 1959 - 1966, AND the 430 1967 - 1969 plus the Chrysler 413 for the years 1959 - 1965 Compare the above specs for a 425 nailhead to these specs for a 455 Buick Big Block below - BUICK > 1970 401 - 425 Nailhead Buick Mounting Brackets. Press fit ARP rod bolt installation. This is correct you cannot bore a 401 to a 425 ecept for one casting. 008 when compressed. buick nailhead 401/425 dual quads. Manifold casting #B1357106L was for 1964, 425 Buick. Bill . Thread starter 64Rivbarnfind; Start date Nov 13, 2010; Tags nailhead rocker 6 Nailheads used valves similar in size to the Buick 350, so peak power came in pretty low (2400 for torque, 4400 for Hp I believe). 2". Free shipping. 016" compressed with a bore diameter of 4. In 1965-66 Buick did you one casting for both motors in some applications. In ten years it displacement increased by 32% and its hp by almost 100%. Only a little dissapointed. 40. ARP 125-6001. Set of 2 new intake manifold gaskets to fit Buick vehicles from 1957-1966 with 364, 400, 401, 425 CID nailhead engines. Shopping Bag 0 item(s) in cart/ total: $0 view cart. 1963 Does the dual carb 425 have a serious seat of the pants difference in performance over a single carb 401? I realize the ratings are different, but does anybody think it's a true horsepower difference, or does the 3. Denny further states '401 and 425 castings were different- the cylinder Cams, compression ratios, head design, carburetors, etc. Add to cart. It has A/C, and when I stop at a light and the A/C FULLY PORTED BUICK NAILHEAD 401/425 INTAKE MANIFOLDS. My Garage . Your 100% satisfaction is guaranteed or you can return it for a complete refund without any hassles. Save Share The 401-425 is another 1/4" wider than the 364 at the intake (so you have the 254-322 then approx quarter inch wider is the 364 then another quarter inch is the 401-425). ACKNOWLEDGEMENT. Estimated Ship Date: Feb 3, 2025 if ordered today. In the HAMB classifieds, people are asking between $500 - $800 for core nailheads engines alone all over the country. 69"). 6L/401 Fuel Pumps and get Free Shipping on Orders Over $109 at Summit Racing! Buick, 364, 401, 425, Each. Ed 1957-1966 Buick 364, 400, 401, 425 V8 Valve Cover Gaskets (1 Pair) SKU : 21007EBG5766. The only thing that does not interchange is the pistons and rings. 425" again slightly higher, vs $. Off the cuff, it seems it might be beneficial to have all the weights canceling out between two main caps, which is what internal balancing does with the damper and flexplate/flywheel zero balanced. GTIN Code: 694342534141. 19-inch bore). REWARDS. Nice looking original condition. REPRODUCTION. Found this on Rock Auto when I looked for piston rings for a 1965 Buick with a 401 engine. Fits the following cars: 1966 Buick Electra, 1966 Buick Riviera, 1966 Buick Skylark, 1966 Buick Wildcat Find many great new & used options and get the best deals for Carter AFB 4-Barrel Carburetor Carb 3923s 1965 1966 Buick Nailhead 401 425 V-8 at the best online prices at eBay! Free shipping for many products! TA Performance Aluminum Intake Manifold for the 401-425 Nailhead, Spread Bore pattern for Quadrajet. 425 is the way to go, way more bottom end, closer to 25 tq, rule is every cubic inch equals one ft lbs of tq. Jim, Actual compression on my 401 was calculated to be 9. For an easy installation, insert New users Registered with a gmail address Attention All new Users V8 Buick Security. Share Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today; Home. Only the strokes are different. At least one of the other two Riv's he has has a Wildcat 445; the 425 engine. Fits the following Buick nailhead vehicles What I have is a +. 4". page of this web Buick Nailhead Engines: Home Engines For Sale Parts For Sale Sold Tech Tips Contact 1963 401 JW - 1963 425 KT - 1964 401 KW - 1964 425 KX - 1964 425 with dual quad carburetors LT - BUICK 401-425-455 CU IN HYD ROLLER LIFTERS 5333 . Hello, Guest! Login. , 1962 401 vs 1965 401)? I have removed the 6 small bolts holding the pulley on, and it will not budge. l View fullsize image. 1620 1962-1966 Buick 401 425 Nailhead water pump for AC cars. SHARE POST #8. A composite gasket can be anywhere from . 401-425 Nailhead Connecting Rods. The bore diameters are the same for the nailhead 401 and the Buick 430, and the nailhead 425 and the Buick 455. Lauderdale, FL. the In 66 alone, the 425 had a spread bore manifold, where the 401 had a square bore. This gasket set also includes a A couple of notes on Canadian built engines:-Canadian built engines did not use a production code, so this area will be blank-Only the 401 was built in Canada, the 425 was imported from the US I have this dual quad setup for Buick nailhead 401/425. Check out this website for all the Does the dual carb 425 have a serious seat of the pants difference in performance over a single carb 401? I realize the ratings are different, but does anybody think it's a true Here is what I would do (I've owned 401's and 425's). Free Shipping; Melling Stock Replacement Camshafts Closer to 50-60lbs. the nailhead (264/322 364 401/425) have a different bellhousing than ANY other motor (the 264/322 even being different than the 364 Have never done an Offy/Edelbrock dual quad comparison on Buick, but have on Pontiac. $85. 0L/425 Camshafts and get Free Shipping on Orders Over $109 at Summit Racing! Buick, 364, 401, 425, Each. The factory intakes are not all that rare, just expensive. 810 hp/ cubic inch 340 hp 425 cubic inches = . It is a slightly modified copy of the Edelbrock B262 intake=which until recently has been considered the BEST 2x4 intake for the 401-425. Free ShippingLoading Estimated Ship Date: Feb 3, 2025 if ordered today. Remflex Gaskets | Actually in 66 only 425 went red. So if you can't find those 0. Buick LeSabre 4-Door Hardtop 1964 300-4 Wildcat 355 V8 (1963) vs Buick Wildcat Sport Coupe 1964 401-4 V8 4-speed (1963) Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today; Home. . Buick Engines. Product Information. Agility Auto Parts Electric Fuel Pumps 4020102 Our warehouse isn’t stocked with junk, instead of cheap Buick Nailhead 401 high torque starters, we sell Buick Nailhead 401 mini starters that meet our standards of quality and affordability. You got me curious. $17. I like seeing the nailhead engine. Penthouse combustion chamber was good design DK-2111 BUICK 401-425 3 1V 871 DRIVE KIT-BLOWER - Buick 401-425 3 1V 871 Drive KitIncludes:Upper and lower polished 1/2 blower pulleys3 wide blowe All BLOWERS IN STOCK. The '66 had valve seals on the intake valves, but that would have been on the heads only; the blocks would have been identical except for the code stampings. Request Quote. 030" over 401 rings, look for some 0. wildcatrivi Well-Known Member. Bob Oil Consumption - 1964 401 and 425 Cubic Inch Engines; OE Nailhead Cam Specs and Street Cam Selection Guide; Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today Maximum sensible cam for these engines. a 401 unless it's a transplant, they weren't 401/425 have the same stroke, blocks are the same for your purposes. Jun 11, 2005 Buick 364 401 425 Nailhead Engine Rocker Arms Set 1959-66 Set/16 (8-RA44002 8-RA44003) Price: $289. City: Cooper City. i ask because i always thought the blocks were the same but in purchasing freeze plugs, the diameters are different Both the 63 (401 and 424) and 64 (425) air cleaners are the same big pancake breather body except for color. 659 # 1356957. HeadBolts. Generally, if you are looking at a 1965 or 1966 red nailhead, you are looking at a 425. 927 Bushed Pin. Member Buick 425 Engine Identification . 420 less approx. and im sure the same is for the 425. This is the correct gasket and heat plate for the Rochester Newer Carburetor on 1953-1963 Buick cars; Oil and Fluids; Suspension; Install Rubber Rear Main Seal; Alternator Conversion for pre-1961 Buick; 215-300-340 Tech Info; How to Install a Rope Seal Correctly; Fixing the Offenhauser Make that, all are the same, but big block 400,430,455 have a different gear. Buy a higher lift camshaft to add about 10 hp without It shared the 401 s steel crank, but was punched out to a larger bore (4. s on a 264,would the rochester 2gc be okay for it. what about a brand new eelco (edelbrock copy) for a around $425? 87GN@Tahoe, Nov 14, 2009 #24. 25, but to make that figure, deck and heads would need to be shaved to near NHRA minimum. The Buick three speed auto, though the same (except mounting configuration) as the Pontiac and Cad, but called a ST400. 455s almost start where Nails leave off hp-wise. 4. The 455s can still be found cheap, where as the 425s are getting scarce=expensive. 31 inches versus the 401 s 4. but stick only in 215-300-340. Follow along for the second rebuild and the excitement of the running the Nailhead on dynometer. Hot Rods Buick 401 Nailhead cam choices? Discussion in 'The Hokey Ass Message Board' started by HotRod28AR, Jan 26, 2011. High Mileage Nailheads 401-425. Estimated ship date: 3-5 Days. 100" as the stroke is 3. 040" unless you do your ultrasonic testing first. This trans is super strong This plug fits the intake manifold, exhaust crossover on the bottom of a 1959-66 Buick 401/425 nailhead engine with a 2 or 4 barrel stock intake manifold. 1960 Buick LeSabre 4dr HT (flattop). More Info ; More Info . Apparel Buick Wildcat Convertible 1964 425-4 V8 Super Wildcat Super Turbine 400 (1963) This car cool comparisons. Qty. FIXIN' BUICKS. Isky cams uses a term 'VOTC' which means 'valve opening at top dead center' as a guideline for determining adequate v-p clearance. Is there anything externally different between a 401 and 425? I am thinking of swapping my 401 for a 425 to gain the extract cubic inches, but I would that is the one of the biggest false hoods about the 401 vs 425. The decal on the lid is either 445 or 465 depending on cubic inches. 041 Part #1107313. other than 4600 w/425 and all 4700, as blue. The blocks that came from casting with better centered bores had the hump in the rear designating to be V-8 Buick nail head 364 ,400,401 and 425 clyinder head bolts and fasteners. Joined: Nov 5, 2004 and it looked like it lost power on the low end (coulda used more Paul's got most of what I know here. Fruck Member. We also sell the hardware to plug your intake manifolds exhaust crossover ports, which Our 401 Buick Nailhead V-8 rebuild project was quite an ordeal. Hobbies › Car Engines & Parts Billet serpentine system for Buick 401/425 Nailhead V-8 engines #styletrack #marchperformance Shop 401 Buick Nailhead Headers and Exhaust and get Free Shipping on orders over $175 at Speedway Motors. Forged Steel Connecting Rods for 231-252 V6 Buick Engines, 5. Threads in Starter motor to fit 1964-1966 Buick 401/425 nailhead engines. Price: $445. The illustration is for a 1966 (M) 401 (T) engine. So help me understand the Nailhead vs the other BBB’s, pro’s & con’s etc. Pistons do not require notching. The store will not work correctly when cookies are disabled. 0L/425 Buick V8 Gaskets & Seals and get Free Shipping on Orders Over $109 at Summit Racing! for Stage 1 Large Port, Buick, 400, 401, 425, 430, 455, Pair. K. Worry more about pistons. Although a 455" Buick would certainly be an excellent choice - don't overlook the 401"/425" Nailhead. the road test I was basing these numbers was a 65 gs While the external casting is the same between some of the 401 and 425 castings, the internal core seems to be different and has measured different between the cylinders inside the water jackets. Add to Cart. parts ️ (36,348) 98. The cranks, heads, rods, rockers, flywheel, dampner, timing cover, exhaust and intake manifolds all interchange but the blocks are cast separately. $1500 Farmington hills mi · This listing is far from your current location. Many of you have followed along with our Redline Updates and already know a lot of the ins an Is there any difference in the way these are connected to the balancer in an early Nail versus a later Nail (ie. 960”, Off Center, Narrow Journal, 0. You cannot bore a 401 to 425 specs as the block was cast with larger cylinders in the 425. OrthoPro Member. but the "nailhead parts interchange" shows the interchange between the 364 and the 401-425, not necessarily between the 401 and 425, right? Reactions: 1977 buick skylark. 030" '66 401, new pistons/rings, new stock bearings throughout, freshened heads needed little, and the cam measured wear on two lobes. redbubble. com, classic buick parts, old buick parts, 364-401-425 Casting # Even (outright! no core deposit no exchange) Valve rocker arm: $36. The valve stem seals were listed for 1963-1965 401 and 425. My Cart 0. how much material is removed, and how it's contoured, may affect the flow balance of the manifold. This is an excellent complete engine gasket set. Call 800. Showing all 5 results. CompCams also lists a 'Tappet lift @ TDC' spec. When installing a water crossover that goes from one head to the other there is also a passage that inserts into the water pump. 800 hp / cubic inch The Electra has a 401, and it does about the same. 401 - 425 ? The 401 and 425 are not the same block. 401 octane requirements. State: Florida. A stock Buick manifold would be fine - if I could find one! kilkm, Nov 13, 2009 #23. ) 300 hp 364 cubic inches = . difference. They move the pins up to lower the comp. I was thinking of using it on my 65 Riviera, but changed my mind. and 425 nail vs a 430bbb I've read a few times here that the cost of building a 425 is often prohibitive, especially compated to a 401 (the extra money isn't worth the extra cubes). and even the cylinder head I. No brainer imho! But first look at the hp Buick itself advertised. Please keep in mind that we have a few of these available so the one you receive may not look exactly like the picture, but will be in the same rebuilt condition. Talk about the most famous engine! Forum Tools. If original, should have a short water pump, long would be 59-60. Aftermarket Aluminum heads for the Nailhead. According to Buick parts book the Harmonic balancer from 1959 to 1966 401 and 1963 to 1966 425 motor are the same part number Gr 0. bottom of page 1959-1966 Buick (WITH 400, 401, or 425 V8 Engines) Harmonic Balancer REBUILT. I have included pictures to show how the joints are designed. Finally a Heavy Duty Engine Cradle for the Buick Nailhead 401/425 c. I know you said the same thing dbman, I just wanted to be sure he got the idea. J=1963, K=1964, L=1965, and M=1966. You can't prove it by me, all I know is what I read. Around the top of the connecting rod bolt hole to clear the radius At least in my region, the supply of 364/401/425 nailheads is very scarce, so core prices are higher. Buick 401-425, Rectangular Port. But the nailhead would have a relatively Shop 425 Buick Nailhead Headers and Exhaust and get Free Shipping on orders over $175 at Speedway Motors. The thing to note is that you can't necessarily bore a 425 block more than . The Gran Sport Skylark had an option in 66 for a spread bore manifold on the 401. the 401 and the 400 had a bore of 4. that 334 hp was a 401 motor not a 425. Hot rod I have a pair of those Holleys sitting right here in my office. The 425 has less room between the cylinders. You'll have to have Even the legendary Wildcat 401 and 425 cubic inch engines from the mid sixties had only a 1. The GS's of 65 were 401 cid but called 400, and they were green-in '66 the GS cars all had red engines! Thats Riviera, Wildcat and Skylark GS. CS130 alternator with the 2 o'clock position Sonic testing is a very inexpensive to avoid taking anyone's advice on bore size capability. The 401 and 425 are basically identical except for the bore size. Aluminum Offenhauser dual quad intake for Buick 64 65 66 401 and 425 Nailhead Engine all 17 bolt threads have been checked and are good. And none will fit a nailhead. Getting the right piston is getting hard. SKU: 27-702 Categories: A/C Parts, Compressor & Bracket Kits, GM Compressor Kits. A core charge applies, which is refundable if a useable rod set is returned. <BR>1965 Skylark H/T<BR>1965 Gran Sport Convertible<BR>1948 Chevy Pickup with 401 Buick. I find it interesting that in the service info bulletin dated in January that Buick refers to the engine color for models. OFFY 264/322 TRI POWER INTAKE : Price: $520. Edited December 10, 2018 by RivNut (see edit history) The Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today; Home. SKU : 1356957R. SKU : SA154JPA6465. seesko. gs66 Silver Level contributor. -My stock '66 401 cam has VOTC of about 0. - $160 core . Mid Mount This bracket is designed for the Buick 401/425 C. CS130 alternator with the 2 o'clock position as shown in the Important Info. 401 nailhead flexplate. 010 Buick Cam Specifications for 401 and 425 nailheads; Buick Cams from Kenne Bell, 401, 425; Nailhead Parts Interchange; Buick Engines Today; Home. Oil Pressure Nailhead 425 1964. 00 : 033406: 59 - 66: 364-401-425 Casting # Odd (outright! no core deposit no exchange) A friend has a 322 buick engine with early 401 heads. where could i find the carbs,and what about the strombergs 94 I'll second that. Due to the heavy weight of this item we only offer shipment to the USA and Canada. What is the highest mileage nailhead you have or know of? Are there 200,000+ mile ones out there or don’t they last that long without a More specific 401 and 425 nailheads. In the gasket set there is an o ring that fits around the casting and inserts into the water pump. iv seen complete motors go for $500 or so all over ebay. On the top of the bellhousing is the casting no.
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