Other than option differences like power windows, locks, decor trim and door handle length cutouts for early models, there were also a few minor differences in things like the way the inside door handles attached, or was it the different door trim types, whatever it was it was a case of adding a new screw hole in a different location, different window adjustment bolt location, or change in window motor mount? Something like that. But was an early vs late door, 81 and 78 models, good to go
