A Body Disc Brake Swap 101

I have a 1971 Plymouth Duster 340 Vin .it has drum brakes with sbp on the front and I'm planning on doing the disc swap to bbp. I did see in this thread that the 340s came with discs so they must have been hijacked.. From what I have researched the best parts to use are from a 76 A body for the larger caliper piston. And the calipers need to be mounted on the rear due to the sway bar. Am I headed on the right track here. And now for my question.... Does anyone have a complete part list to go to Napa , Advance Auto or Autozone and buy all the parts.. I dont have a donor vehicle. THANK YOU for the help!!