80-86 doors won't fit newer trucks, the bottom rear of the inside of the door does not have a relief dent to fit in the newer jamb. 80-81 trucks have the door lock button by the handle. 80-86 vent wingsdifferent. change in 87-91, then again in 92-97. all can be interchanged, but glass is wider from 87-97, and the vent wing on 92-97 changes to accept a mirror in the vent area. starting in 87, the flow through vent is in the doors, all doors will fit 80-86 trucks. interesting note, 80-86 had metal inside door handles, wich will fit on all doors.