I'm not talking down about your friends' abilities or anything, but if they can't figure out how to unplug a wiring harness, then plug it back in on a different vehicle,you may want to re-think their abilities

Just unplug it, take it out, put it back in the same spot on the other truck, plug it all back in, and drive. Chevy's and Ford's have wiring harnesses as well. The fact that it has an ECU means little.... just unplug it, and plug it back in on the new truck lol