1973 valiant 318 car stalls when compressor comes on

I have a 73 valiant 318 with ac when I turn.the ac on the car stalls plus the power wire from the alternator gets hot I just got the car and the harness connector was burned up I ran and repaired the wires after that it started overcharging so I changed the regulator and it is now charging 14.5 volts but when I tried to turn the AC back on car stall dead in it's tracks even raising the idle I'm new to a body mopars is it possible the compressor is shorted out and plus should the idle kick on higher when ac is on? I do not see any type of stepper motor for the ac anything would help thank you from Nick in Raleigh nc