The voltage regulator on my car is in good shape and looks nice but is a Chrome Echlin unit and I was thinking of putting one on that is more correct. Looking at the ones offered by Mancini, I'm confused. Which would be correct for a 70 Challenger? I don't understand the difference in their OE Muscle Car vs. The OE ones.

http://chucker54.stores.yahoo.net/oemuscarvolr1.html