A-body Disc brakes

Lee is right; it was the first thing I did when I began modifying my Barracuda and you need the upper control arms. They were easily obtained at the junk yard but 70s era cars are getting scarce. I did the job 3 or 4 years ago and the cost of the donor parts was under 100 dollars. Plus, having never done it before, removing the parts from the donor car was invaluable experience. Tom’s suspension book goes into great detail about how to get this job completed properly. The MoPar Action article has a real good parts list and easy to follow sequence pictures, but its important to plan ahead. Most of the suspension bushings are worn-out and rebuilding the front end now makes sense. If you plan on adding a sway bar later on, the stock caliper location will cause interference but you can swap them to orient the caliper in the rear.
Good luck