1964 Chevy Truck Won't start

Electrical problem
1964 Chevy Truck V8 Two Wheel Drive Automatic many miles

The coil wire on the engine harness was smoking, so I ordered a new engine wire harness from Classic Industries (includes a wire to the coil, to starter, temp gage) which is very simple, yet after installing the harness, the starter runs fine, but the engine will not start. I checked for fuel and I checked for spark. While the key is in the start position I am getting spark, but when you release the start position it simply dies like it is not getting any fuel or spark. Any ideas? I know its something simple.

Thanks!