Throwing my hands up on this ignition!

bob mCcarty said

disagree with the last two posts, back when we went with higher comp. on the hemi, the orange and chrome boxes wouldn`t fire hot enough , popping all the way thru. The comp. is the only thing we changed , beside intake and head gaskets , an msd 6 stopped the popping and banging , it was the only thing changed that time too .

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What exactly do you mean higher compression? Air is an insulator which resists the spark jumping the gap. People running superchargers or turbochargers run smaller plug gaps, as low as 0.015". High compression, superchargers and turbochargers cram more air molecules into the plug gap which inhibits spark travel. It is like those hi tension power transmission lines are suspended on high towers with the wires held far apart to keep the 118,000 volts in the wire.