73 Duster - I didn't take it apart....body assembly questions

Question 3: the drives side door uses a totally different window regulator than the passenger side. I already did the research & figured out that the drivers door must have been swapped for an earlier door. Other than the window mechanisms the doors look the same to me, but is there any thing I need to be concerned about? Any issues with putting 73 door panels on a pre-73 door?