I have a 1990 542B that got water down the exhaust system so she doe not want to start. Is there anyway to free it up so it can be moved easier than just dragging it? This machine has the 4cyl ford in it, anyone done a top end rebuild on this engine and can tell me if there any gotchas to watch out for? thanks in advance - "the idiot that left the muffler uncovered and pointing to the sky"