These low mount alternator brackets mount common Delco alternators below the frost plug at the left front corner (driver's side) of your small block Compatible with Chevy using bolt holes next to the timing cover. They are ideal for custom builds, street rods, and tube chassis cars that do not have power steering and work with short ('55-'68 S/B Compatible with Chevy) water pumps. These brackets will support a standard full-size GM alternator. Includes bracket, bolts and spacers. Compatible with 55-68 Chevy SBC Engines with Short Water Pumps