Magnum swap EFI wiring

No the pcm is much smarter than that. It doesnt just measure ohms load across pins, it has 8 wires going to trans, 4 are returns from sensors that if they read out of spec for more than a minute or two will set code and most likely put pcm in limp mode. Gov pressure needs to be seen, out put speed sensor too as well as trans temp and gov solenoid. Just find a 5 speed pcm in u pull it yard for $50 or less depending on location. It will play nice with your 727.