rear brake help for sen gen

[lukky 71]

i have a 71 camaro. im leaving stock disc up front but want to put to run disc in rear. i have a 12bolt and i have see some cars with disc off of 2000 camaros with cadillac calipers. what brackets for do you use for calipers? what master cylinder and porp valve do you use? can any one help me with this or would it just be better to order a complete kit from some company. on a budget and just want to shop around for my best options. thank you for any help.