first youll need time bro. 2 weeks or more if you work like 8 hours a day on it. it isnt a weekend job. i exaggerate slightly. second youll need to check local laws regarding vehicle modification to find out if youd need the same year motor or not. third youll need a few cases of beer. hehe, no thats me. ok. seriously.
1) Best to get a complete Explorer V8 wreck and start from there, if not, proceed to the following list
2) Complete explorer V8 engine with all accessories, engine driven fan, EEC, and wiring
3) Battery cable harness from explorer V8
4) Cruise cable from explorer V8
5) Throttle cable from explorer V8
6) Radiator from explorer V8
7) Radiator hoses from explorer V8
8) AC lines from explorer V8
9) Exhaust manifolds and Catalytic converters from explorer V8
10) transmission (and transfercase / output flange) from exlorer V8 will fit snuggly
11) Airbox, MAF, and Zip tube from explorer V8
12) Fan shroud from explorer V8
13) motor mounts:
If torsion bar front suspension - use explorer V8 parts
If coil spring front suspension - use 4.0L mounts and plates designed by BrainB31
14) swap out fuel pressure regulator in the tank with the regulator from explorer V8
15) have Ford Dealer re-program PATS to synch EEC, PATS module, and Keys.
As for the fuel system, you have two choices. Run a return line or use 98+ (or 99+?) explorer rails which are returnless. Also, use the in-tank fuel pressure regulator from an explorer pump assembly. That is very important, as the 4.0L Ranger in-tank pump is set to ~60psi and the explorer 5.0L pump is set to ~42psi.
any more questions looky here http://www.rangerpowersports.com/for...play.php?f=159