i just use the autolite for a stock 5.0. i forget the part # offhand, there is a part # serch engine on autolite's web site, check it out. i gap the copper plugs to i believe .054 and never had any probs.
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1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong!
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