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  1. 5.7 Chevy Vortec exhaust manifolds

    OK I'm turning to the board for information. I have a 327 with 906 vortec heads. I want to use stock exhaust manifolds. This engine has a 600 CFM carb. (1406) What OEM part numbers will work? What exhaust manifold part numbers hooked up to the 906 heads? Please help.