Finishing restoration on a 70 Challenger T/A. My question is what ballast resistor to use. I converted to electronic ignition and the harness is set up for a single resistor. I know that there was a single used ith points like the car came with and there was a later design used on electronic ignitions. Is there an Ohm difference? Does the dual resister have a start and a run resistance and is that not necessary? Gerry.