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I had a Mallory Dual point distributer with a Pertronics upgrade in it. Converted over to Mopar performance with a gold Box and plugs looked real lean had to jump jets from 76 to 88 in the rear. Is this common? I'm running VP110 and the plugs are just starting to look alittle gray.



Jet for max MPH... thats seems like a big jump so
something wasnt right before