I was able to get disk brakes & spindle from this Maverick, but according this VIN number, I did not think they had disk brakes in 73. The car was a 4 door Inline 6 with auto. Maybe some swaped them out.
That's a Comet door bro. Check that Vin to teh Inner Fender or the Dash or wherever you can find the body side vin.
91 / 62A - Maverick 2-door Sedan Standard
92 / 54A - Maverick 4-door Sedan Standard
93 / 62D - Maverick 2-door Sport Sedan Grabber
30 / 54B - Comet 4-door Sedan Standard
31 / 62B - Comet 2-door Sedan Standard or GT