Lets you adapt large Holley 2 bbl carburetors to Rochester 4 bolt 2 bbl. manifold base. This adapter includes two gaskets and needed hardware.
The smaller pattern on this adapter as supplied fits base size 1-7/8" x 3-1/4" to Holley (or Ford) 2 bbl that measures 3-1/2" x 5-1/8".
It is designed (with just a little work with a file) to be used to adapt from base 2" x 3-3/4" to the Holley/Ford 2 bbl as well.
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