Did you find what you were looking for. I have several sets of marine hardware. (3) Edelbrock sets. One with over the transom aluminum bells with removable baffles and (1) Nicson manifolds and timing/pump cover, Ring gear housings and plates. Driveline couplers, ski rope attachment tree bolts to top of intake manifold. Block off plates. Etc.Here is an add in the Seattle Craigslist. Not mine.
Edelbrock marine boat exhaust manifolds 348/409 - boat parts - by owner - marine sale - craigslist
Edelbrock marine exhaust manifolds came off a 348 could possibly fit a 409 too. Perfect condition, no damage, and no previous repairs. $1200seattle.craigslist.org
i have a very nice pair of 409 Nicson manifolds, bellhousing and Casale v driveLooking for a pair of water cooled exhaust manifolds…prefer Edelbrock…others considered.