Mopar performance alternator 1or 2 wire???

Its a 71' also I am using msd. I actually converted my 68 cuda to a 2 wire circuit. The other wire just looped back into the other circuit.
It will still face the issue of voltage drops and with that the flip situation as to when running the external regulator. Increasing current through resistance in the output circuit will result in lower system voltage. This means everything runs worse and the battery may be undercharged. When it does charge it may then charge at excessive rates.

Also keep in mind if you need to replace it its not a stock item. That's something important to me but may not be a factor for you.