This bracket is designed for the 1965-81 Ford and Mercury 170/200 C.I.D. Engines. Replaces the factory mounted alternator location to mount an aftermarket Sanden 508 compressor and standard Ford alternator. Bracket mounts solid to the engine block and water pump. Will work with factory power steering and air pump applications. Applications for this bracket include Mustangs, Falcons, Pick-ups etc. Will not work with aftermarket exhaust header.