I don't know a comprehensive article for the 2001~2003 Ranger V8 swap. A 99~2001 Ex 5.0 should be the easiest swap into a 2001~2003 Ranger but there are a few special circumstances that must be addressed for these years.
The Type E PATS in the 2001+ Ranger is a different system and is not compatible with the 99~01 Explorer PCM. One solution is to add and wire the Explorer's Type B PATS Module, PATS Transceiver and keys. Another possibility is to turn off PATS in the Explorer PCM via a custom calibration.
In the 2001~2003 Ranger, the speedometer is driven by the PCM based on a signal from the OSS sensor at the transmission output shaft. In the Explorer, it is driven by the 4WABS Module based on the signal from the VSS in the rear diff. After the swap, The Ranger PCM and OSS will be gone and a module is needed to send a speedometer signal based on the VSS - the Ranger 4WABS Module cannot do it. Some have swapped in the ABS controls from the Ex. I used a GEM from another Ranger to do it. It should also be possible via an aftermarket speed correction module.
Power steering high pressure hose:
The top portion of the 5.0 Ex PS hose near the pump is a different shape, so the Ranger hose will not fit. On the other end, the fitting on the Explorer hose assembly won't fit the 01~03 Ranger steering rack. I cut the two in the steel tubing portion near the rack and married them together with a compression union to make a custom hose assembly that connects the Ex PS pump to the Ranger steering rack.
Doing a 4x4 complicates things but that is true of any year Ranger V8. Even more so for a manual transmission 4x4 Ranger V8.
Here is some reading that should help:
1998+ 5.0L Ranger swap discussion:
The ultimate 98+ Explorer-based 5.0 V8 swap thread. - Ranger Power Sports Forum
2001~2003 5.0L Ranger wiring guide:
2001 Ranger 5.0l Swap Wiring Guide!!!! - Ranger Power Sports Forum
My 2003 swap in progress:
Bob's swap project: Level II meets 5.0L - Ford Ranger Forum - The Ultimate Ford Ranger Resource
Mountaineer Center Console, Edge floor, Trip Computer - Ford Ranger Forum - The Ultimate Ford Ranger Resource
Swapping An Explorer 5.0L In To A 1998-Up Ranger
BW4406 swap into 5.0 Explorer:
Convert V8 AWD to BW 4406 Manual Shift- A how to thread - Ford Explorer Ranger Enthusiasts "Serious Explorations"«