Those fold down rear seats are really cool. I had one in my 69 Mach 1, back in the day (71-76). And our 1969 Shelby GT500 has a fold down rear seat also. Our 73 Mach 1 does not have a fold down rear seat, but I would like to have one. That said, it feels like converting our rear seat to a fold down version just would be worth the effort. The rear seat is too small for practical use anyway. And, if I need to carry or transport something so long that it needs a fold down seat to place it inside the car, I will just use one of our SUVs. Now, if I were to happen to come across the needed parts to do a fodl down rear seat conversion I just may take that on as a project.