This kinda coincides with my last post but I thought I would start a new one. The Manifold on the 235 and carb are in great shape. The manifold however has been split for dual exhaust. I want only the original single. But looking at the engine, the split is not that noticable so I am going to stick with it if I can. My ? is.. Is there a way to block the unused section of manifold off with a piece of metal cut the same dimensions and sealed with sealant?Thanks