What Mike B said. You need to run some Marvel and Blaster around you valve guides. Rodent pee will rust your guides and can ever get into cylinders. I have seen this many times, even crawl up an open or rusted out tailpipe into an exhaust port. If the muffler and exhaust system looks good you should be ok. Good barn finds are what we all hope for. What '37 barn find said on page three gave me a real laugh, did the screw driver thing myself once. DOC
Last edited by Doc.Hall; 06/06/2020 1:14 PM. Reason: additional info