I have a couple questions about which spark plug leads should be used with a Pertronix insert. I understood that copper wires were a cause of misfires, and that you need suppression wires.
The suppression wires I have seen are really long, and I don’t think you can “trim to fit” them like you can copper wires. Am I wrong?
It depends which Pertronix module is in the Pertronix dizzy. The first generation module will work fine with most decent quality wires even stranded copper wires. The second generation module absolutely won’t. It requires suppression core wires or the interference will cause awful misfiring. I think but am not certain that their dizzy still has the first gen module in it.