overcharging

I have an aftermarket radio in my 66 mustang and it was perfectly fine when I had a straight six in the car. I recently put in a 302 and now i cannot hear anything on the radio except when i use the brakes or turn signals. Im guessing that it may have something to do with overcharging? If...

I hope some one can help me with diagnosing an overcharging problem on a friends 72 Mach 1. The car is complete with a fresh 351, the new charging system consists of all new regulator, battery, and a 3 post alternator setup for a serpentine belt. The first issue was a non-charging one, w/ no...