Thanks. Lotta work, enjoy the old gal.
Gary can probably give you the exact details and the link to his work - that's where I got it last summer - but the bench in my truck was way passed saving and I wanted an upgrade to the newer 60-40 split bench that came with the later models.
This adapter plate makes it an easy transition as you can see the seats bolt directly to the adapter plate and the plate bolts directly to the existing holes in the bullnose floor pan. Gary can tell you the make/year/models this plate was used - mid 90's I think - and the rest is searching the net, putting out feelers, maybe scrounging around some junk yards to find one.
Bottom line - absolutely awesome upgrade. The seat is much more comfortable. The existing seatbelts still work. With the adapter its an easy to do upgrade. The middle (40%) seat folds down and I have cup holders, a place to rest my right arm, and extra storage. Plus, you can flip the middle part up and you still have room for three people.
1986 F250HD 4x4
5.0L EFI, NP435