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Carburetor Base Gaskets

Gil’s Garage

Gil Baumgartner
CTCI Authenticity Chairman

The following information corrects previous available data regarding the carburetor to intake manifold gaskets.

Research reveals that the 1955 Thunderbirds had a stack of five thick gaskets stapled together. The four center holes were 1.38” in diameter. The four bolt holes were .34” in diameter. The FoMoCo part number was B5S 9447- A.

The 1956 Thunderbird had one carburetor gasket made from heavy paper material. The FoMoCo part number was B6A 9447-A. The originals when ordered by a Ford dealer for FoMoCo came 10 in a package.

The 1957 Thunderbird had two heavy paper gaskets part number B7A 9447-B, one for each side of the spacer block. The spacer block was made from dark brown composite material approximately 7/16″ thick.

The 1957 E model gaskets consisted of two B6A 9447-A and a 1/8″ aluminum spacer plate for each carburetor.


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