Ignition Coil Overheating

I have a 1966 Barracuda that I have restored. I have an electronic ignition module and distributor. I had the electronic ignition before and had 100,000 miles without a problem. My problem is that the ignition coil overheats and the engine stalls out after about 15 minutes. I am at my wits end as I have gone through the wiring several times at that seems OK. I have replaced the plus, plug wires, rotor cap and rotor, ballast restore, ignition module and coil. Still have the problem. I checked the timing and that is OK. I checked for excessive voltage and the alternator is putting out 13.18 volts at 1000 RPM which seems OK. Still the problem persists.

I am running out of options or places to look. Anybody have some ideas of where to look next?