Thanks to all, especially JMC. This is my first post on eng swap for a 97 F-150 Lariat, 4.6, 4x4, automatic from a 2000 F150, 5.4, 4x4, automatic. I'll be more detailed later. For now, I've swapped out the eng, trans, xfer case, pcm, & eng bay wiring. I tried to fire it up yesterday with no luck. I noted the fuel rails didn't pressurize so I attemped to change the instrument panel....different connectors. That's basically where I stopped and came back to read all the notes. If I'm correct, the eng won't start because of PATS. The short answer is I need someone to come to my home to disable PATS to start it, then tune it. The long answer for other reasons I'll discuss later is I may have to get an eng bay wiring harnest from a 97-98 with a 5.4. If so does that vehicle have to be a 4x4?