[Michael in Sedona]

I've run a '29 Tudor Sedan for over 12 years with a Pertronix ignition with absolutely no problems. 12V, negative ground.

I've also run a '29 Roadster for over 12 years with a stock ignition with absolutely no problems. 6V, positive ground.

I will say that the car with electronic ignition starts instantly, whereas the one with stock ignition might take a second or two to start running. Other than that, I can't tell much difference at all. I converted the Tudor Sedan to 12V, neg ground with electronic ignition when I was new to the hobby and was worried about reliability. My fears were probably unfounded.