There are a lot of write-ups and build threads for 98+ ranger 5.0 wiring and swap info. I'd follow through those to see what they said about the wiring. I do know that if you don't have the torsion bar frame ranger, you will have to make or purchase a set of plates to replace the motor mounts. You may also have to match the return/returnless fuel lines depending if you have the same system or not. Along those lines, the fuel pressure regulator may need to be replaced or swapped out with the donor (needs to be 72psi). Other than that, you shouldn't have to worry about wiring PATS, I think you can just swap the transceiver, key and computer over. I am not sure about your VSS or ABS wiring either. As I recall, there is a lot that just swaps directly over, given your year ranges. At the c110/c115 (42pin connector), I grounded the starter relay wire to the firewall next to the pcm where another ground is already present. I have to match up the remaining few wires going to different pins on each side of the connector (donor/ranger). All the wiring I had to do under the dash was for the PATS, ABS and VSS.. these are things you want to look at first, involving your own swap combo. I wouldn't be surprised if all you had to do was get plates and relocate a couple of pins after dealing with your fuel system differences..
Look for write-ups that others have done. I always learn something new even if it isn't always my exact swap combo.
Wish ya luck
