Quote:
Originally Posted by Bob Mulry
I didn't see a spec for lifter diameter in the NHRA Technical Bulletin for a 1988 Oldsmobile with a 307ci engine, but classracerinfo.com said .842 lifter?????
On line it looks like only the early Oldsmobile's take the .921 lifters????
Have you measured the lifter bores in your 307 block????
I am just confused
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Bob,
1966-1967 400 and 425 Olds engines use a .921 Dia conventional hydraulic lifter.
However, the 1985-1988 Olds 307 with peanut ports, rated at 138 HP, and the 1981-1985 Olds 350DX diesel engine use a .921 hydraulic roller lifter.