Trkngmc,
When you installed the Pertonix systems, do you remember if they had the black plastic ring with the embedded magnets? I am seeing that they have a system that uses the distributor lobes to trigger the spark. Pertronix ignitor 1168LS.

I wonder if this is there fix for possible issues with the plastic ring?

Rock49 aka C-Rodg
work in progress
1956 Chevy 3100
261 engine