I have a 99 gt that's been rebuilt. I just noticed the rear end is crooked and the subframes are beat up. Prob from a jack or speed bumps. Now my question is. If I pick up a high mileage v6 car, use my gt for a parts car, and say I wanted a coyote swap. Would I have to do any ecu swap from my gt to the v6 since the coyote has its own stand alone ecu and pcm?