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Old 01-29-2020, 06:29 AM   #20
cadillac_al
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Join Date: Oct 2013
Location: Maine
Posts: 2,351
Re: L31 Crate Engine

Flat tappet cams are fine with stock Z28 valve springs. It's the high performance guys that seem to run into problems. I put a used flat tappet cam in my truck 5 years ago.
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