16 year old needs help with disc brake upgrade!!!!

First off you have to decide if you are going to use 72 down sbp front end/ brake parts or 73 up lbp front end/ brakes . Not sure if 70-72 disk and drum cars use same pitman , someone here will know
Then you should download the service manual for the year you decide on , that will help .
Your car is not messed up you just have to organize and take it step by step , not easy but not impossible

page with manuals
http://www.forabodiesonly.com/mopar/showthread.php?t=132309