Ron Francis Retro Series Harness i've installed the Ron Francis Retro Series Harness on my 71 Charger. It didn't take 30 min, but was fairly easy and quick. I too have a 383 and mopar electronic ignition. Hooked everything up and fired the motor on the 1rd pull. Only extra thing I did buy in addition to the harness was the Ron Francis version of their mopar alternator regulator just because it was plug n play with this harness and figured why not replace the stock old one i had anyway. I did spend some extra money at the local parts store on zip ties, tape, shrink wrap, and stuff. Also found the correct bullet type connectors to plug into the stock non ralley dash. I haven't hooked in the headlights and taillights yet cuz the car is being repainted right now but I have tested the circuits and they work just fine. Getting new connectors for those shouldn't cost much either. I have a thread with pics on the 71-74 charger forum also. But i am planning on redoing the whole thing again after paint so I can hide most of the engine bay wiring that you might see in those pics.