ah, just mufflers...
okay. I assumed they were doing some muffling function and/or keeping water out. But was thinking there would be a specific term for them. In my searches, I'd seen references to 'silencers'. I just wanted to be sure I was searching for the correct thing as I go off to order parts.
Relatedly, anyone with recommendations on best places to find parts or manuals for older boats like this '76 S&S ?