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Seem to be some members here who have good handle on setting up ignition timing. Where should I start with setting up this msd I have what springs etc should I use as initial setup? 360 is approx 12.5 to 1 mild ported J heads cam is sig erson 3h 477 lift 240/240 @50 Victor 340 with 750DP...

Hi guys I am trying to find a short plug with the smaller 16mm hex head that fit the standard 440 cast iron head to give me increased header clearance. I've been driving local parts store girl mad going thru all their plugs trying to find one that works