Replacement drums and hubs for 1969 Dart with 5x4.5 lugs?

Sounds to me like your going to be looking at Ford parts on your car . This could get costly depending on what will adapt and how you would do it for drum brakes. I Know 1968 Mustang rotors switch small bolt disc to big bolt disc on an A-body pretty easy. Good luck.
Using mustang rotors for 4.5" bc