I have a question for the electrical experts: I bought a Beck Arnley aftermarket ignition switch to replace the 40-year-old OE switch in my '70 Z.  Seemed like a good preventative maintenance step, with the steering column currently out of the car.  However, I've found puzzling difference in the operating logic of the two switches. It has to do with the switches' 'R' circuit, which I'm pretty sure means, 'Resistor' (as in, ballast resistor for the coil/tach circuit). With input power a