The OP Rangers been shown on here a few times; it last changed hands 2+ years ago if you note the dates.
@racsan - That Ranger doesn't have the defunct JC Whitney kit, but more like the Custom & Commercial Wheel kit (which I think he still sells).
Custom & Commercial wheel kit consists of 2 rear and 2 front wheel adapters.
The adapters change pattern from 5x4.5 (Ranger) to 5x205 (dually rims) bolt pattern while spacing things out ~2-3" in rear/4-5" in front.
Note: The rims are 14x5J which means you need to mount 195/xxR14 tires. They don't look out of place on an '88, but might be small on newer Ranger. I'm pretty sure he's getting the rims from South Asia - they have a bunch of little dually trucks over there.
Plus the appropriate fender flares.
Personally, I would sooner go for 6x205 dually rims as found on Mercedes Sprinter vans. They allow for 205/xxR15 tires (There's are also some narrow 16" dually rims in Europe. We just need a globe trotter like RonD to send us a set or 2 back while he's there.
How good are you at fiber glassing?