Challenger Brakes on a Duster?

So the car was converted from factory disc to BBP drum (from and unknown source) and now you want to go back to factory disc using a '73 Challenger as a donor? As long as the control arms are the stock '73-up A-body, the '73-6 A-body and '73-4 E-body brakes are a bolt-in stock application. All the factory '73-6 A-body upper and lower control arms and lower ball joints are the same.....drum or disc. You just need everything from the spindles out.