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I think I can safely speak for a LOT of owners,,,,,GM Red wires,,and AC Delco Iridiums!! The iridium's perform well and last well!! .040 gap and you are good to go!!!
had msd wires but 2 of them went out on me ,now i have gm redwires,i keep away from the plugs with the pucks on the electrodes cause ive heard they fall off