1973 valiant 318 car stalls when compressor comes on

It runs very well I adjusted the carb and tuned the car up plugs wires cap and rotor it has a electronic ignition on it I haven't checked the timing on her but she pulls very well it has 19 inches of vacuum at idle the system looks like it's R12 I know that the battery lead from the alternator gets very hot when I put the ac on then the engine stops in it's tracks I think the compressor may be shorted thank you redfish I think that's why that connector burned up possible I'm new to this car and Mopar but I'm having a blast on this old valiant