This bracket mounts to the alternator to the front of the head on the driver's side of a Small Block Chevy using existing drilled/tapped holes in the head. It lines up with pulleys and belts for the short water pump.
For a complete A/C and alternator kit which requires no mounting holes on the heads, purchase #91667919.
This alternator bracket uses the first groove (groove closest to the balancer) and the A/C unit uses the second groove. If power steering is used with bracket #91667920, the power steering belt makes use of the third groove (farthest foward groove) on a three groove pulley (our pulley #91015480.)