Have 2 electronic distributors , Mopar and Petrinix

Year vehicle is important. Did you convert to an electronic voltage regulator when you converted to the electronic ignition? There is an electronic regulator available that looks like the original mechanical one & is a bolt in replacement for it. On eBay for $27 I believe. Lots of the big parts houses have it too but you might have to take it out of the box & look at it to make sure it's electronic & not mechanical.