1932 Mr. Gasket Carb Adapter - Open Center. Adapts 4-barrel Square Flange carburetors to spreadbore intake manifolds. And yes, it works in reverse. Just flip it over, and it allows you to install a spreadbore carb onto a square bore intake manifold.
Mr Gasket 1932 Carburetor Spread Bore Adapter Spacer Plate 4 Barrel 3/4" Thick
Mr. Gasket No 1932 Spread Bore to Square Carb Carburetor Manifold Adaptor Plate
Mr Gasket Carburetor to Quadra-Jet 4-Barrel Manifolds - part # 1932
1937MRG Mr.Gasket Carb Adapter Kit-Large Holley to Small Rochester 4-Bolt(both
MR. GASKET 1in. Open Center Carb Spacer Aluminum P/N - 6005
Mr. Gasket 671 GMC Supercharger & Tunnel Ram Dual Inline Carb Linkage Kit #3831G