SBP to BBP Disk Brake - 68 Valiant
I like the Wilwood kit for a few reasons....It can retain the 5x4 bolt pattern and it doesn't push the track width (only .20) like the 73 and later set up. I have a 69 Valiant I am wanting to convert to disc and a 74 Dart Swinger that is a factory disc car. It was difficult getting wheels to look right on the 74.
Wilwood is a brake manufacturer. Most of the kit companies are just sourcing chinese parts (not that most brakes bought today at your local parts store aren't chinese).