I run both the mopar and the hei.. A flip of the switch and I can go back and forth between the 2... Found a wiring diagram on redneck fabrication website and then installed it on my 65 valiant..
I had previously run a straight hei system, but found it would not start consistently.. Now I start with the Mopar and flip in over to Hei for the hotter spark. Using an MSD BLaster 2 coil.
Works great so far..