If using a one-wire alternator with this set up, where there is no AF/VR"I"/ ballast wire, where does the alternator output wire come into play? I'm running a MSD 7AL-2, would the +12V 'exciter' wire, from the IGN toggle switch on my Painless Wiring switch panel, take the place of the AF/VR"I"/Ballast wire? Just trying to get this straight before I start rewiring my drag race only 72 Dart.