Andy F's kit, sold through Mancini, fits Viper calipers to Corboda rotors on large bearing ('73+) drum spindles. The kits contains the bracket to mount the calipers and spacers for the pads. Dr Diff has bearings spacers to fit the large bearing Cordoba rotors on small bearing (pre '73) drum spindles. Andy's kit does not fit Viper calipers to 11.75 discs on disc spindles.