The first couple times I swapped Mopar electronic ignitions into my points vehicles, I used the supplied double ballast resistor. Several times since, I've left the original ballast resistor in place. I ran a stock or stock-replacement coil. All of those cars - and I have 2 currently - ran fine, and I'd drive a few of them for 8 hours or so taking trips. This is going back into the early '80s.
