425 Oldsmobile Engine Specs - Jack In The Box Team Member Job Descriptiontimeline Videos The oldest castings (used. 40 rows1967 oldsmobile engine specifications ('66, '68 and '69 specs are also included, for comparison purposes) The boxwrench engine specs database is a community resource for mechanics of all skill levels to access a reference library of firing orders, distributor rotation directions and block. Motor says 389244d with c heads. I say a performer bbo intake with the stock 750 cfm qjet rebuilt. Or a custom tuned 76 to 79 800 cfm qjet or a 750 street demon. Oldsmobile 425 v8 1966 with 4. 125โณ bore, 10:25 compression ratio. 425 internals [or, is that forged crank and short stroke a bonus?], requires the early pattern flexplate, and those 0. 921 lifters at $100 a set or so, which require shorter. Bigblocks displace 400, 425, or 455 cubic inches.
Jack In The Box Team Member Job Descriptiontimeline Videos