Thank you! you are spot on! I saw that exact part, but it just did not look right. Now that I look on the door panel, I see the car was built 06/73.
If I switched over to the D4AZ, then I am assuming (without parts in hand) that I am going to need a different ignition key than the stock one...
I have a 1973 Mustang Convertible with a tilt-wheel steering column. My Steering Column Lock Gear has worn down gears. This is the part that interfaces with the steering column lock actuator that controls the ignition rod. Presently to turn the car off, I use needle nose pliers to pull the rod...