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Vortec heads, HEI and spark plug gap
I'm noticing that all the IR and Plat plugs recommended for the vortec headed sbc engines come pre-gapped at .060. I've always thought that the base gap for these should be .045 and that's how I've gapped copper plugs in the past. Have I been doing this wrong all this time, or does the coatings on these plugs require a bit more gap?
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1972 C30 Grain Hauler, 350/400
1967 1500 GMC Stepside SWB, In Transformation Process
1967 RS/SS Camaro 350/TKO600
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