Mr. Gasket Carburetor #1932 Aluminum 4 BBL Barrel Adapter Plate. The adapter allows you to install a square flange carburetor (Holley 4150, 4160, Edelbrock, Carter AFB onto a Quadra-jet or Thermoquad 4-barrel spread bore intake manifold and it works in reverse.  Look the pictures over to ensure it meets your satisfaction before buying now or making an offer. Check my store out for any other needs you may have or just browse for fun...Thank