Vent line from evap recovery system, it's usually tied into a the right side engine breather along with the carburetor float bowl vent and also the air cleaner cleaner housing.
ah, i see. well, being ive swapped in a 440 and it doesnt have any of the evap stuff anymore, what could i do with that open line besides leave it open? could i run a rubber hose from it up to a mini breather or something?
