Your local hardware store may have brass pipe fittings that will work.---Depends on how much room between carburetors I guess.-----Be an easy fix on my work bench.
Look for------haulover inlet----Videos of various boat performing in big waves.------Bowriders fill up faster than bilge pump can pump water out.-----That boat is meant for small lakes and small rivers.
Every outboard I have worked on has had a warp in the cylinder head !!!----Some more than others.----That is the nature of an aluminum casting over time and heating / cooling cycles.---So there.
Just one cylinder head.----Easy to refinish yourself if you have a flat surface.----Like a piece of hefty glass and valve grinding compound.-----A bit of elbow grease but good results with minimum material removed.
