Yes I have the factory ECU and engine harness yes I here the PATS are easy what I really need is identification of the engine sensors and various pin connectors.Did you get a factory ECU and harness with yours? My new truck has a gen2 3.5 EB and I’ve been playing with the tune on it, and although I have no need to test, it looks fairly easy to disable PATS and other un-needed functions.