I think we all know that it's different; the tensioner is in a different location. But why wont it work? I.e. is the belt different (size, shape, etc)? Will the PS or the alt not work? A/C wont bolt up? Will it hit the firewall or the side of the engine bay? Why is it that I have to switch?

I installed my old 3L hybrid (old style FEAD) in a 2001 Cougar (new style FEAD) that had motor with the new tensioner style and didn't have any problems.
Also I'm pretty sure it's going to work. I helped with an installation that took a 2001 2.5L from a Cougar into a '98 Tour. If what you guys are saying is true, then that 3L Escape motor with the same style FEAD should fit in my carā?¦