This is a Vintage Air Steel Extra Clearance Top Mounted Bracket Chevy Small Block Short Water Pump Alternator Bracket for the Drivers Side. It is best for applications such as tri power or dual quad carbs. It bolts to water pump and intake and no head bolt holes are required. It also clears most tall valve covers as it moves the compressor and alternator forward to clear intake and oil filler.
Please Note this is for the alternator bracket only and not any other items shown in this photo.