Thanks to the Bearhawk forum. Got a lead on the best gasket to use. TCM Part #65218, ACS Part #06-02143. Safety wired flange to carb body bolts. Sealed rear of carb body with RTV. Completed carb heat door and fab inlet seal.
Oiled K&N filter (AO77A6) Filter OD 7.5 - 7.625 OD Height 2.5"