They will bolt up. My 86 (the one in the picture) had a 97 bed on it. Molly has a 97 bed also. IT WORKS
Sorry if my earlier post was worded a bit strangely. I was simply pointing out that people have swapped pre-'80 or post-'97 beds onto '80-'97 trucks. Maybe I didn't go about it correctly, but I was trying to support your statement that any '80-'97 bed will fit.
For that matter, any cab from '80 to '97 will fit any frame from the same time period (with the exception of the '97 F-150), and other than some issues with the '92-'97 bumper, same with any front clip.
More information that the OP was asking for, but it might be valuable to someone who finds this thread in a future search...