Hello, I was just wondering what the spark plug gap should be for my new engine when i put it in. The block is a brand new GM 350 four bolt block. The heads are worked over cast iron 1.94 heads. I didn't know if it was 0.035" or 0.045" Thanks for the help.

if a standard HEI i run 40-45, never had a problem.

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the rule I have been told is-

HEI= .45 gap

POINTS= .35 gap

now a super hot points set up will use a .45 gap. and I have seen some HEI's use a .60 gap. I use the rule I posted when I do plug's.

Thanks, I am going to try .045" cause I am running HEI. Thanks for the help.