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tubman · 12-16-2020, 10:35 PM

Every flathead 4 BBL manifold I have seen (and I have owned a few; Sharp, Fenton, Edmunds, Offenhauser) had the "square" carburetor mounting pattern (this was used on WCFB's, early Rochester 4G's, some Ford carbs, and Stromberg 4 BBL's) and the Holley won't bolt on. Adapters are readily available to solve the problem (Speedway, for one, has them).

Or you can look for one of the earlier carburetors. I think they look better, but they are now hard to find and even cores are expensive. I did run a 390 Holley on the Offenhauser manifold with an adapter and it worked fine.

12-16-2020, 10:35 PM	#19
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,320	Re: distributor Every flathead 4 BBL manifold I have seen (and I have owned a few; Sharp, Fenton, Edmunds, Offenhauser) had the "square" carburetor mounting pattern (this was used on WCFB's, early Rochester 4G's, some Ford carbs, and Stromberg 4 BBL's) and the Holley won't bolt on. Adapters are readily available to solve the problem (Speedway, for one, has them). Or you can look for one of the earlier carburetors. I think they look better, but they are now hard to find and even cores are expensive. I did run a 390 Holley on the Offenhauser manifold with an adapter and it worked fine.