Questions on lifter bore correction

[SSDiv6]

Originally Posted by Jeff Stout

For a stocker application can I change lifter diameter? I plan on correcting lifter bore and bush but having a hard time finding quality lifter in my diameter. .921

Jeff, if your Olds 307 block has the .921 lifter, the block is for a hydraulic roller lifter, not a conventional hydraulic/flat tappet lifter.

According to the NHRA engine specs, the legal block for your HP rating, has the standard .875 hydraulic/flat tappet lifter and not the .921 hydraulic roller.

Also, the .875 Chevy lifter is not the same as the Olds/Pontiac lifter. They have different oil band locations.