Wilwood's Classic Series front disc brake kits for 1964 to 1974 GM A-body, X-body and 1967-69 F-body offer disc brake upgrade solutions for OEM Drum & Disc brake spindles. These kits feature the FDL-M four piston forged aluminum caliper and 11.00" diameter x 1.00 thick one-piece rotors. This new kit widens the track by only +.47" from original drum brake position or narrows by -.03" from the original disc brake rotor assembly. The FDL-M caliper is a modified version of the time-tested Forged Dynalite caliper, and provides the greatest amount of wheel clearance of any four piston caliper in its size class. The OEM style one-piece cast iron rotors with integrated hubs simplify installation while providing superb dimensional stability and wear resistance. These versatile kits are easily optioned to suit the braking requirements and style preferences for a daily driver or the most discriminating show enthusiast. Intended vehicle applications require no modifications for installation, and clear most 14" OEM wheels. Classic Series FDL-M kits can be used with either manual or power boost master cylinders, and come complete with calipers, rotors, brackets, hardware and detailed installation instructions. Kit requires purchase of additional brake line kit shown below.