A-body Disc brakes
Hi POPS6T6:
Tom Condran has detailed almost everything you need to know plus many more related topics see:
http://www.moparpages.com/suspension_book/ .
It cost 30 bucks and is worth the money if you have never done this before. I disagreed with him on one point and that you can reverse the steering knuckles so you can install a front sway bar, he was adamant that it causes Bump Steering.
Even MOPAR Action disagreed, when they recently reposted there disk brake swap article.
Go to
http://www.moparaction.com/tech/archive/disc-main.html and read that too.
I believe I paid much less at my local auto wrecker for the parts.
Good Luck