73-76 A body (Duster, Dart, Valiant, Scamp, etc.). You will need the upper control arms (large ball joint style), spindles, and proportioning valve if you're still running rear drum. There are multiple threads on the forum on what it takes to do this. This is probably the cheapest and easiest way to add disc brakes. Find an old parts car and rob everything you need and get rid of the rest. If you feel like spending some money for a kit then Wilwood or Scarebird makes kits that will use your existing spindle and convert to disc.
