Tav, mine is a 71 Cuda with original sheet metal, and OE chrome dual racing/sport mirrors.
Drivers door: 1" down from top to screw centers
16 5/8" (front edge to forward screw center)
19 3/4" (front edge to rear screw center)
Passenger door: 1" down from top to screw centers
17" (front edge to forward screw center)
20 1/8" (front edge to rear screw center)

Thanks for taking this on.
Hope this info helps!
Dave