Dog, the last three barn finds I've been involved with the engine ran fine after just cleaning carbs, new oil, battery, plugs and new fuel. Interestingly most had been parked because one of the spark plug threads had been striped out, which is and easy fix. A lot depends on mileage.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken