1973 Plymouth Scamp accelerating/braking issues, please help

Hey guys, I have another update to my car issue. The scamp is running great for the first hour, then begins to die again. I noticed after replacing the distributer, she fired right up, ran like a dream for about an hour. Then went to gas her up, and couldn't get her to start again.. After several attemps she finally kicked and I was able to get her home. Parked it in the garage, the next day she fired right up again, and ran great for another hour. Haha. Could this be an electrical issue? or quite possibly a transmission problem?

I replaced..
Carb - Holley 1920
Fuel Pump
Fuel Filter
Ignition Coil
ICM (Ignition Control Module)
Voltage Regulator
Cap/Rotor/Cables
Spark Plugs
Ignition Coil (Disconnected Resistor - is it necessary to have it grounded?)
Point/Plugs
Timing 5° BTSD
Distributer

Thanks for checking this out fellas!