California Classic Chrome Part Number CCC0647580 Steel Triple Plated Copper/Nickel/Chrome Big Block Chevy Engines 1969 - 1990 396 427 454 With A Long Water Pump It Will Mount The Alternator On The Passenger's Side Of The Engine Just As the Factory Brackets Do Upper Bracket Is Made From .100 Thick Steel And The Lower Bracket Is Made From .200 Thick Steel Does not come with bolts.