RBS stocks a large line of carb adpts. and here is another shining example. This carb adpt. starts as a solid chunk of heat treated billet alum. and is machined to fit all 4-71 GM type roots blowers allowing you to mount one 4150 Holley/Edelbrock type carb a top your supercharger.
The adpt. is show polished and includes all gaskets and mounting hardware to bolt to the supercharger. Fits all standard Holley 4150, Edelbrock, or Carter type flanges. Carburetor adpt. is .750" thick.