anyone using this brake kit? (speedway motors)

Hello, has anyone tried this disc brake kit? I was curious about the quality. I can barely get replacement hubs and calipers around here for the same price. Thanks in advance. Sorry I couldnt get a direct link to work so its the mopar disc brake kit in the second row. http://www.speedwaymotors.com/m/961_1955-72-Street-Muscle-Disc-Brake-Kits.html