1972 Demon 340 engine mods

If your cap has terminals like that, then the last inch or so of the associated wires, if any kind of carbon core wire, will also be junk.

A 20psi boost in cylinder pressure is a flipping HUGE change,lol
Yes the whole ignition system needed a rework. Keep that cap if it works; the brass terminals look nice. Hope it does not have any cracks.

20 psi in the cylinders? Yes, that is a whole point increase in CR! That will sure make it run harder down in the low RPM's.

BTW, at first I read the above as using 20 psi turbo boost....I wondered how THAT got started LOL