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  1. QTR MI

    Spark plugs

    Have a 408 stroker .030 over Hughes hyd.roller cam 608/603 lift @254 duration aluminum heads ported/polished Harland Sharp 1.6 roller rocker assembly Holley Sniper EFI 10.5-11 to 1 compression. Suggestions on spark plugs to run? Thank you.
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