[OldRapidRoy]

Hi new to this forum and searching for information on a 21-bolt motor I have apparently its from a boat.Because it has water cooled aluminum exhaust manifolds, aluminum heads, aluminum intake dual carbs with them slanted forward by a wedge underneath. I,ve found one old picture of a Chrysler boat with a flathead in it just wondering if anyone eles has heard of this.
Thanks Roy,