Magnum swap starts, does not run

I think that you have hooked up everything correctly as far as I can tell, I looked at a schematic and it looks fine. The only wiring thing I would check is how/when pin 9 is getting power. The original ignition switches have 2 ign positions, and they are separate terminals. In start, the coil got full 12v, so there is a (brown?) wire for ignition in start, and then a (blue?) wire for ignition in run. What I did was connect those two wires together coming from the ignition switch, and then hook them to the pcm. This way the pcm has constant 12v in run and start. You could temporarily hook pin 9 up to 12v battery and try it to see if its dropping out. Sorry if you checked all this, everyones setup is a little different!