NEW GOLD ZINC POWER BRAKE BOOSTER 9" DUAL DIAPHRAGM FOR 1964-1966 GM A-BODY, 1964, 1965, 1966 CHEVELLE, EL CAMINO, MALIBU, SKYLARK, CUTLASS, 4-4-2, F85, VISTA CRUISER, LEMANS, GTO, TEMPEST Brand New Gold Zinc 9" Power Brake Booster (Part # 300-7966). Features: | * 9" Single diaphragm, delco-style booster | * Includes the brackets to bolt directly to the firewall on the applications listed below 2 Master cylinder mounting studs are 3/8"-18 and measure 3 3/8" center-to-center Includes clevis, push rod extension, nuts, washers, and dust boot Fits: | * Chevrolet: * 1964 - 1966 Chevelle, El Camino, and Malibu | * Buick: * 1964 - 1966 Skylark, Special, and Sportwagon | * Oldsmobile: * 1964 - 1966 Cutlass, 4-4-2, F85, and Vista Cruiser | * Pontiac: * 1964 - 1966 Lemans, GTO, and Tempest