Chrysler V8 Marine Exhaust Manifold 3-in OD 45-Degree Elbow 318 340 1966-1972 Flywheel Housing 7L 350 Alpha One™ --

7L 350 Alpha One™ -- All Years

but with a new gasket this shouldn't give you any trouble (see pictures 4 & 5)

Mount:  44344T 2

From the photos

Chrysler V8 Marine Exhaust Manifold 3-in OD 45-Degree Elbow 318 340 1966-1972 Flywheel Housing 7L 350 Alpha One™ --Part Number(s) Included No part number for this unfortunately 45 Degree Cast Iron Elbow 3" Outside Diameter Around 5" in length (Roughly 5 1 4" tall sitting on a table) General Application Compatibility Seemingly 1966 to 1972 Chrysler V8 Marine Applications, but might have been specific to the unknown boat manufactuer. It does have the same cast in "tag" that other chrysler parts have, but I can't make out the number Other Details Freshwater Used