New Mr Gasket carburetor adapter. This adapter allows use of a spread bore 4bbl Quadrajet carburetor (2 big holes, 2 small holes) for use on factory/aftermarket 4bbl intakes with the square bore mounting flange (4 holes of equal size). Adapter is approx. .750" thick.
NOTE : If using this on a factory shaker, it will raise the carburetor by nearly 1", making modifications required and/or removal of the factory air cleaner to maintain the shaker.