CCP a-body disc brake conversion...any good??

Kieth, it sure looks like the CPP and Dr Diff kits use reproductions or service replacements of factory parts. So yes, you could probably save a few bucks scrounging used factory pieces, cleaning them up, replacing the worn items, etc... Assuming your time is worth nothing. On the other hand, a box full of clean rust free ready to go parts has it's advantages. Cass (Dr Diff) is Mopar guy, and has a good reputation as others have mentioned. He is certainly responsive if you have a question. Customer service seems to be fading from the "click and ship" world we live in. I can't speak for others, but to me there is value there as well.