Here is what I did. This is a cut down 3x1 Offenhauser for a six. There is a cast in runner for exhaust heat that runs from the exhaust manifold connection, where the plate is, under the carb mounts. If you are running one carb in the center of the intake you could put both, in & out, heat connections in the plate. A large volume of hot water or exhaust should not be needed.
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