Easy way to upgrade OBD I to OBD II
Might add that if cruise control was important, you might be able to swap the switched in the steering wheel and avoid the whole "resistor" fix. I think that is what the guy did on his swap in the first link I posted.
I have a 91 Dakota that I plan to swap a 5.9 into and was looking into how to do an OBD2 swap at the same time. My steering wheel won't allow for swapping the switches and (as I recall) I can't swap wheels either. Thus the research into how it worked.
In the end, I am going to just convert to a '95 or so ECM for the 5.9, which has it's own share of problems like a returnless fuel system on the 5.9, change to the speedo output on the trans and no speedometer cable so the need to convert to a 95 instrument cluster with it's associated pin changes.