318 Starting Problems, Help

Currently, my 318 will initially start but as soon I let the ignition key turn from start to run position the engine dies as if it was out of gas.

Engine 78' 318 with an Edelbrock AVS, new fuel pump, with a Mopar electronic ignition system.

The problem arose when I was driving in traffic, water temp gauge needle moved slowly to indicate the engine was running hot (this was one of the few times the engine ran hot), then the stopped running and would not restart even after the engine was cold. I filled the gas tank that day and was still full.

My first thought was the fuel pump, so I replaced the pump though I continued to have the same starting problem.

Next thought was plugged main jet in the carb, clean and rebuilt the carb, found a few small particles in the secondary jet. But I still have the same starting problem.

Could this be an electrical problem with the ignition switch?

I believe the problem is electrical. Check if you have 12 volts when the key is in the run position. 65'