Re: Shaft Rockers
If you run big lift and/or a lot of spring pressure, shafts are a must have. The way I found out was, I put a dial indicater on a stud, inline with the rocker, and rolled the engine over and had over .0015" flex of the stud.
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1964 GTO 2750# 606" IA Pontiac 8.2550@164.17-1/4 1.1981-60" 5.2901@131.97-1/8
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