Doo Wop Swap

The Offenhauser 3660 Accepts two 3 bolt 97’s on a small Rochester or Holley 4 barrel – Manifold   The new Offenhauser “2×4” adapter. The ONLY adapter which allows you to mount two of the popular Stromberg 3 bolt carburetors in place of either an early or late quad carburetor. This universal “2×4″ adapter fits…