SBP disc brake conversion

I have a 69 Barracuda with 10" drum brakes that I want to convert to disc on the front. I have spent hours reading posts and articles on this. I used to have a great write up on this but can't find it. I have a set of spindles, control arms and backing plates from a late 60's/early 70's disc brake A body car. I always seem to find that it is the little stuff that make projects like this difficult. My question is, what parts do I need that I can't buy from a parts store i.e rotors, calipers, master cylinder, proportining valve etc.? Is there a bracket I need for the caliper? Or am I better off SBBC kit?