Damn that sucks. Good to know you can swap a different make motor though. But damn this sounds like more of a hassle than I want to go through. I may end up leaving it stock for now and thinking about it later... I'll talk to my smog guy.
I'd really rather not have to run the 4.6L Ford motor. I'm just not as hot on that idea, and its a smaller motor, for a lot more money.