Electronic ignition upgrade / voltage regulator question

Summit Racing CD ignition is a rebranded Mallory I believe. I was running a Chrysler electronic ignition before. At this point I think I do not need the ballast resistor. The coil gets its power through the Summit ignition and is not otherwise connected to the BR. Thus, there would seem to be no reason for the BR any longer. I just need to get hooked up to the ignition switch. Thanks for the inputs, they clarified the issue for me.