The 2.5L Duratec was available in the ST24 Mondeo, having owned one I wouldn't bother with it revs nice but not to powerful, the 3.0L in the Mazda Tribute and Ford Escape, I tend to agree with Bonus as stated above.
The Jaguar S type rated at 240hp is the one I am planning on using, I am a bit of a stickler for Ford into Ford and I already have the Getrag RWD transmission to suit it.
The 3.5L and 3.7L V6 engines in the Mazda CX9 are a Cyclone engine and quite different to the Duratec, this was also fitted to the V6 Mustang although not imported here back then.