Are they different assemblies? I see Dynacorn makes a reproduction for 70-72.

 

The 70-72 holiday coupe rear seats are narrower than the 68-69 to accomodate the change in arm rest, but a post coupe should be the same. 72 uses a slightly different seat bottom than the earlier years. The outside ends are notched where the seat goes under the upper cushion to clear the 72 style retractable seat belts.

 

Thank you for the info. I'm re-covering the seats, but the bottom is covered in rust scale. But the real issue is two welds are broken. I really need a welder, or a cheap seat frame.