1965 Valiant ballast resistor question

Thank you!
I will make sure the jumper is insulated well. In fact, I'll probably gut a resistor and hide the jumper inside for a cleaner look. I just wanted to make sure I was doing it right.

If I was running the Pertonix WITH the resistor and not getting the full 12V, could that have caused a low speed "hiccup"? Sort of a random miss, up to about 45 MPH?
I took a very short test drive with the jumper in place and it seems to be gone.