[Jonboy]

there are three styles of door panels. THe panels from 73-76 are shorter, and fit into the recess of your doors. The window crank stand is shorter on the 73-76 doors.

The inside of the doors was redesigned for 1977, with the availability of power windows for the first time. The power window regulator was longer, and the inside of the doors were redesigned to accomodate this. The door panels are both longer and lower, covering the raised portion that fits up to your 1975 door panel, and covering just about the whole width of the door. The window crank stand is longer, and is used through the rest of the production run.

The third style of door panels is 81-up, and were redesigned when the new aero (for a truck, anyway) style debuted in 1981. The rest of the interior was freshened up accordingly. These door panels are more squared off, just as the outside of the trucks were.

The later door panels will work, but the panels will bow in around the crank handle. you can use self tapping screws at the bottom to hold the panel in place, and the armrest stand will work with the later armrest.