All you really need to make a C4 or the similar C5 work is a cooler setup, a vacuum line and a shifter. I used a B&M Unimatic cable shifter, looks kind of similar to the stock floorshifter. It works on a bunch of automatics, pretty sure it will work on the AOD if you go that route too. You will need a little wiring for the neutral start switch for your truck to work with it though.
If you find the tailhousing off of a Ranger or BII with a C5 you can have that installed on a C4 and use the stock transfercase you already have. You will need a different linkage if manual t-case (let me know, I have a page about what works somewhere) The C5 I got has had the back end switch so my stock 1350M mounted perfectly. The V6 C5 has fewer clutches in it but can be rebuild to V8 spec. Whatever you find the bellhousing, flexplate, engine seperator plate, torque converter and starter all have to be for the same tooth count. C4/C5 can vary 147t (or thereabouts IIRC), 157t and 164t. The bigger the more common, the smaller the better the fit in a Ranger engine bay (especially without a bodylift. AOD's are all 164t.
I used the foxbody convert/SN95 mounts and would recommend going the V6 mount with plates route. I am unimpressed by the lack of adjustability and holding power of the single stud in a slot. If you are good with the torch/plasma cutter like Ford when you cut the notches you may be ok heightwise... but you have virtually no adjustment side to side. I just spent 3 weeks off an on during monsoon season adjusting mine so the engine can't shift and let the oil pan rub on the crossmember...