If you have been reading my replies about working on seats, you know I spend too much time at the ASY. The following pics are what I put together from 2 different yards, I had to make one extra trip for one seat back that I missed, but got some other stuff while I was there, so it probably doesn't count as extra trip.
Would you believe the driver seat is from 3 Explorers a couple years apart? I had to dismantle the seat in place to get it out, the seat back was bent over toward the windshield at about 75* and the rails were pushed into the floor pan. Doesn't look to bad, does it. The drivers seat pad is actually a passenger seat pad put on a driver side frame from another Explorer a couple years older. The passenger seat (second pic) has a seat from a 91 Explorer Sport with the rails, the back is out of a 94? Explorer. The driver side rails are also out of the 91 Sport, these were direct bolt in for my 86 Bronco II.
I guess what I am trying to say is, Ford RBV seats are pretty much all the same, (then I find they made a change in the late 90's or 2000). The bolt hole spacing on the floor is about an inch narrower on the 92 and newer, (9 1/2") 91 and older (10 1/2"), but through 95 the original rails will still bolt to the new seat base. That might even run a little newer than that. To put the old rails on newer seats, up to 95?, you need something close to 14" across where the rails mount.
If you like your seats, but want high backs, you can change the seat backs with the pads to get that. This only applies to the post 95 seats. I haven't gotten into a newer seat yet, and I'm no going to tear the seats out my 02 Ranger to have a look at this time.
I hope this helped some of you understand these seats and what you can accomplish with a little time and thought.