Lets figure out which part is causing the problem. Its either the charging system or the ignition system. Take some old condensors ( if ya need some i can send ya a handfull) hook a lead wire to them and hook up to generator terminals one at a time,terminal to ground,then move on to the ignition coil. If still no relief wrap aprt of the ignition wires in tin foil grounding the tin foil to the engine block with alligator clip foil to the block. Dont let this bother you corvettes used this from the factory for years....
Let us know which on fixes it???