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my brother used to run a circle track small block chevy that had to have a stock intake and had some some stuff from this guy they spilit the intake port then weld back togeather and hide it all in the end http://www.castheads.com/



Several years ago A local Mopar stock eliminator racer told me that he had about 6 grand into SB thermoquad manifold. He figured that it was worth about .06/2mph.