Trouble with pertronix ignition

Ditch it, strike 3 and I would be out. Get an all in one if the self contained units are your flavor. either HEI adapted or a Bosch ignitor style (the ebay 'drop in' ones). Sorry I cannot offer you a fix, but if 3 have gone out in 5 years (almost my luck with MSD 6's) , maybe its just not the best solution.