Msd 6al install. Now over charging

So the car went through 2 ignition modules in about 6 months. So I had the entire msd 6al ,ready to run distributor and coil on another motor in the shop. Installed it. Fired right. Went for a test drive and the wiring start to get hot. Does any have a clue as to what is going on. I personally think I need to just go with a one wire alternator. Any suggestions or opinions greatly appreciated