67 Barracuda Heavy Electric Load

DallasMan2000 said
The voltage regulator plug looks like it came as part of the M&H harness.

View attachment 1716187482

Also, check to make sure the voltage regulator is well grounded. Cleaning off a small spot of paint around the screw hole should do it. I like to put a dab of dielectric grease there to keep corrosion at bay.