WANTED: A-Body 5/4.5 Disc Brake Parts
Dang, I can't use the wheels and rear sway bar off a Dippy cop car on my Dart???
The best way to do it is get all the stuff from you need from a 73 to 76 A-Body parts car. That way you get the 'official' Mopar engineered stuff all in one shot.
Don't forget the master cylinder and brake booster,etc.