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Anyone have a guide on how to gap spark plugs on custom engine?
Chevy 350 .040 over/ "double hump" 2.02 heads (been shaved with 59 cc chambers now), forged flat top pistons, compression ratio 11.72:1, XE274H cam (Lift .487/ .490), HEI, Edlebrock 650 CFM carb
any other info I need to provide?
Thanks
ps using accel header plugs
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