help converting frt hubs to 4.5" B.C.

All there is to it 73 to 76 Dart or Dart Sport get the upper A Arm spindle , rotor and calbers. You my have to change lower ball joint . Lower control arm is same and I belive lower ball joint is to .Just the top is bigger on disc brake one. I did on 70 dart before got light weight wilwood . Also get porporting valve off donor car.