I've got Cass' kits on two of my cars. I replaced a crappy setup that used older Caddy Eldorado calipers. Although the pad size seemed a little small they work well and I don't have a proportioning valve in the system. Feel, with power brakes was greatly improved with an A-body disc brake master versus the 2-bolt "truck" 1-1/8" bore master cylinder with plastic reservoir.