As I trump through the restoration of my Mach I notice how many different things there are on 71-73's. My repop floor pans fit in beautiful, but the rot below the rear seat needs donor metal. There are at least 2 different types of seat hooks welded to the floor pans, there are a couple extra brackets between the frame rail and rocker on the donor parts I have, but not on mine.(Different seat belt mounts) Seat risers are different between fastbacks and coupes. Different pedals and brackets from power brakes to nonpower brakes, disc to drum, etc. And then all of those "spare" brackets on the fender aprons. Cowl to apron, front apron support, and who knows what else. Makes restoration interesting!