Couple of things.
2001 uses 65psi returnless fuel system, I believe Ford only started using this system in '98, so the '97(or earlier) engine would have the wrong injectors and rail, 35psi system with return line, and changing the fuel pump and adding a return line would be a PITA.
You need the computer(and wiring harness) from a 5.0l WITH manual transmission for best results.
The manual trans adds quite a bit more labor since the explorers with 5.0l, the most popular swap, had automatics.
You could just beef up your 4.0l SOHC
4.0l SOHC Ranger was 205 base HP
5.0l Explorer/Moutaineer was only 215BHP
Last edited by RonD; 01-11-2014 at 12:30 PM.