RWA 1255 CAST aluminum 2bbl adapter kit is designed to install a Holley 350/500 2bbl carburetor onto  a stock 2.0 manifold, Cannon Ranger manifold RWA1118 or any manifold with the stock Ford small carburetor bolt pattern. This is the most economical way to bolt on power to these engines and is the hot set up when class restrictions call for a 2bbl carburetor.