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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 original Buick service manuals for the respective year of vehicle manufacture. These specifications should also be correct for the 1966 model year.
V8 Buick Nailhead Casting Numbers, 264, 322, 364, 401, 425. A letter or number after the casting number as in 1165165 X or -3 may indicate a change in update in the casting. This would mean a higher letter would be a later production.
The Buick red nailhead engine appeared in 1965. Generally, if you are looking at a 1965 or 1966 red nailhead, you are looking at a 425. The exception is in the skylark. The 401 in the skylark was also red! Sometimes, the codes have been found to be missing or incorrect. Sometimes the casting number can be either a 401 or a 425.
Jun 28, 2005. #2. Aluminum "Nailhead" Cylinder Heads. We've been following the stories behind the aftermarket alloy heads and the aftermarket aluminum rockers as well. I personally have spoken with Randy (Becker), president of Harland-Sharp and he told me they had an employee or two who attempted the rockers, but sidelined it due to the design.
NAILHEAD Codes 'til '58 The engine serial number is stamped on a machined surface on the top outer edge of the left cylinder bank, between the middle branches of the exhaust manifold. The last digit of the engine serial number is 4 for Series 40, 5 for Series 50, 6 for Series 60, 7 for Series 70.
Moderator. Sep 8, 2019. #5. Here is a 1953 Dealer Service Bulletin regarding Dupont close matches for the nailhead paint. Buick did not offer it for use in the field. These were used as body color on other vehicles back then: 93-71782 = '53 Studebaker. 93-2908 = '39-46 GMC. 93-55911 = '52 Lincoln & Mercury.
Common Engine Dimensions for the Engine Swapper ... Buick V6: 198, 225, 231: ... Buick Nailhead V8: 401 ...
Head Flow Chart. Doc's Dual Plane Modifications. 1954 Blown Nailhead. Nailhead Oil Pump. 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.
Feb 1, 2012. #2. Although the later heads can be swapped on the early engines compression would drop considerably because of the later having MUCH larger combustion chambers. 264/322 dec heights are the same as the stroke is 3.2". 364 is higher by .100" as the stroke is 3.4". 401/425 is higher by .120" over 364 or ,330" higher than 264/322 as ...
The 322 Buick Nailhead was the powerplant of choice in the middle to late 50's and was put in Chevy Duel Wheeled trucks since it was the only engine during that time period that had enough Torque to handle the demands of 4 tires & wheels on one axle. Some also may have had 2 speed rears. The nails were put in the heavy trucks.