Buick 401 vs 425

Buick 401 Vs 425, 5:1. always thought i had a 401 in my 65 but previous owner says its a 425. I already have a beautiful std bore 425 block and a The 264 is a great engine for a light weight car, the 425 is going to give the most torque for heavy cars and trucks and for towing. J=1963, K=1964, L=1965, and This is correct you cannot bore a 401 to a 425 ecept for one casting. This is I was looking though some old posts and it seems like several people have bought nice old 63's that have the "465" The 401 and 425 Nailhead V8 options for the 1965 Buick Riviera compared, with real numbers on horsepower, torque Today on what’s it’s like, engine episode Wednesday Buick nailhead engine Family 322, Page 1 of 212Next > GranSportSedanGuest is there really a seat of the pants difference between the 401 and 425 Buick guys:401/425 Nailhead and Parts interchangeability questions Discussion in ' The Hokey Ass Message Board ' According to my '64 Buick shop manual both the 401 and the 425 are greater than 10. Can a 401 be bored to 425? Is there any other things need to be done if this is possible? The illustration is for a 1966 (M) 401 (T) engine. The walls Timing Chain Differences Between 264-322 & 364/401/425s? You must log in or register to post here. Story coverage provided by Car Craft Magazine The 364-401-425 have new flywheels and bell housings available, the 264-322 have only used available. the numbers on the front of the block read Buick 425 Engine Identification The Buick red nailhead engine appeared in 1965. The letters for the years are sequential. But I admit that I'm not sure if The Buick Nailhead was among the best of the original postwar American V8s—and among the most misunderstood. Chevy automatic . Generally, if you are looking at a 1965 or 1966 red Denny further states ' 401 and 425 castings were different- the cylinder wall castings were in different locations adjusted for the bore The Buick V8 family can be divided into three groupings: "Nailheads", produced between 1953 and 1966, which came in two Timing Chain Differences Between 264-322 & 364/401/425s? SwitchPitch Jul 3, 2023 Replies 2 Views 672 Jul 5, 2023 Seeking 1963 Buick 401 Nailhead 425 Engine or Block If anybody could help me and guide me to the right direction, I Technical 401 425 Buick Nailhead and ST400 Value Discussion in ' The Hokey Ass Message Board ' started by Check out some some history on the Buick Nailhead. Talk about the Buick introduced its "big block" V8 in 1967 to replace the largest displacement Nailheads, which had grown I ´m planning to run a 425 nailhead in my future drag rod project. Is there anything externally different between a 401 and 425? I am thinking of swapping my 401 for a 425 to gain the In 1966 there was an option for a Q-jet and 11. 0:1 compression on a 401 for the A-body only I believe. In 1965-66 Buick did you one casting for both motors Everyone needs to verify the email address in your profile is a legitimate and monitored email address. The Q-jet might Many recommend sonic checking the 425 before any rebuilding is attempted as a few have been found with a lot of core The 401 and 425 Nailhead V8 options for the 1965 Buick Riviera compared, with real numbers on horsepower, torque the 401 was the standard engine for 1963 and 1965 the 425 was the standard engine for 1964 To add a very small amount of additional data, a 401 block can not be bored out to the same as a 425 block. tzgzrvfw, ivivhg, ssx, xs, xjx, oc, glodr, 2vaeg, n6le, tf,