Quote:
Originally Posted by SSDiv6
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.
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Thank you for the info. I swore they were .921. Just finishing painting 1 car and next is 307 olds motor for wagon.