Brake Booster & Master Cyl, NEW 1964-72 (8") - Double DiaphragmThis kit runs a 8 inch Double Diaphragm 4 bolt mount Booster with the mounts for the Disc Drum or Disc Disc needs with proportioning valve and lines as shown. Select what configuration you need. 2 or 4 wheel disc brakes. Suited for the 67 9 Camaro or Firebird Normal V8 or 6 engine with Disc brake front. Same again for 64 72 GM A bodies ie GTO Chevelle, El Camino, GS etc. Also for Chevy Nova 68 72 with its 4 bolt mount. This is perched on an angled