63 Dodge Dart, now let me see;)

I have a ballast resistor on my 71 Challenger that has a MP Ignition kit in it, but it still has a factory 3 wire alternator. I'm not quite sure if the alternator is the determining factor for a ballast resistor or not?

The MP instructions with the ignition kit says to cut the unused green wire with red tracer off plum up to the plug.