need help finding a wire

You should not need to. Re-read my post. If ign2 is not hot in cranking, either the key switch is bad, or you have a wiring problem. The car should have never started "on the key" because IGN2 is the ONLY source of power to the coil/ ignition during cranking

Lots of guys have done this. I had Holley HP EFI on my Dart before I tore it down and it worked just fine that way. At the time I was using a GM HEI module for ignition
Something must be wrong with my ignition cause the brown wire goes dead during cranking. I tried the relay there seems to be a small dead spot when going from key on to crank when the relay switches over. I wanted to do a key fab anyway guess now is the time.