How to Install 14 Inch Brakes on an A-Body (or B/E also)
I've built systems like that before using cut down hubs and factory rotors. We ran a setup like that on a road race Valiant for a while. It worked, but was super heavy. I eventually started having custom aluminum hubs made since the custom hub allowed me to put the wheel where I wanted it. A custom hub also allows you to use different wheels with different center diameters. These days I use lightweight rotors and high quality calipers. Usually Baer rotors and Brembo calipers. Here is the setup I have on my Duster.