Power WIndows In A 65-66 Mustang
Start by installing the lock rod onto the motor shaft, and then reinstall the lock rod back in it's original position.
Drill one hole behind the door panel, about 2" below the existing door panel attaching hole. Head of carriage bolt shows in the picture. I used a carriage bolt so the door panel would not be pushed outward when installed. Bolt the hinge to that hole loosely, using one of the pre-punched holes in the hinge.
Angle the hinge part up or down as required so the motor is at mid-stroke right when the lock rod is at mid-stroke. Mark and drill the second hole (on the left in this picture) to maintain that position. That is all there is to installing the lock motor.
Once I got it all in place, I put a good gob of black RTV all around where the lock motor shaft goes through the sheetmetal bracket hole. This will keep it from rattling.