I'm doing a full restoration. The rear inner fenders (the ones you can see in the trunk) are metal on my 73. It seems to be easier to find 72 A body than 73
The inner wheelhouses are the same 67-76. Pretty sure it’s not just Darts too, it should be 67-76 for all A-bodies. Outer wheelhouses were different by the model, but the inner wheelhouse was the same across the board.