From what I have read no one makes a tunnel ram for my boat? Anyone know if this is true or where I might be able to find one


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Well they dont make tunnel rams for boats     They do however make them for engines, that being said i do believe the one for a 455 will fit a 350. dont quote me on that!

I don't believe when it comes to built v8 marine engines there is a difference in intakes, I know bearing, piston/ring clearances and cam specs there is, most parts from a 455 will work, one major part that won't is an intake, bb is wider than sb


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350 and 403 are short deck and manifolds interchange.

While not a tunnel ram, Edelbrock does make (number 2812) a high rise single plane - Victor - small block chevy's love 'em, I imagine your Oldsmobile will too.