Oldsmobile oil system mods

[Bill Edgeworth]

Originally Posted by SSDiv6

Make sure they are Oldsmobile lifters and not Chevy. The Oldsmobile/Pontiac lifters has the band and orifice at a different location.

Comp cams #863 lifters are a decent off the shelf lifter for these motors.
NEVER use a Chevy lifter in a BOP application as SSDiv6 mentioned the BOP lifter is taller and has the band further up the lifter. If you use a cam with a small base circle the band can be exposed at the bottom of the lifter bore with a Chevy lifter. Not only will you then have an oil problem but you loose support of the lifter in the bore and that could (will) lead to catastrophic failure. While were on the subject of valve train, guide plates are now legal for the Oldsmobile heads you don’t want to run without them!