1) Fitment: 1964-1972 Chevrolet Chevelle 1964-1972 Chevrolet El Camino 1964-1972 Pontiac LeMans 1964-1972 Pontiac GTO 1964-1972 Pontiac Tempest 1964-1972 Oldsmobile Cutlass 1964-1972 Olds 442 1964-1972 Buick Skylark 1967-1969 Chevrolet Camaro 1967-1969 Pontiac Firebird 1968-1974 Chevrolet Nova 1970-1972 Chevrolet Monte Carlo 1971-1974 Pontiac Ventura 2) Mounting studs are 3/8"-18 and measure 3 3/8" center-to-center. 3) Comes with a nice chrome finish. 4) The booster comes with a short pushrod, fully compatible with our master cylinders. 5) Package Includes: As shown in our pictures. This Item Doesn't Come With Installation Guides. We Highly Recommend Professional Installation. We Will Ship Your Package From Different Warehouses.