l Includes all 3 brackets as shown l - For Small Block Chevrolet engines (265-283-305-327-350-383-400) with with Short Water Pump l - Top Driver's side Mount using Water Pump Holes and front 2 Header/ Exhaust Manifold Holes l - Alternator will need to be mounted on driver's side with short water pump l - This Set will mount with or without headers and will work with original ram horn exhaust manifolds as well l - Upper Bracket is about 14" long, 1" wide, and has one 4" slot for adjustment (measurement photo shows chrome version).