My son just bought a 1967 F100 with a 352 Fe and it runs great. The only problem is the old owner had a hose stuck in the valve cover breather port and it smokes like crazy while running. The carb has been changed and many vac lines plugged. the passanger side valve cover has a PCV valve with a vac line to the carb plate the driver side has only the one opening...The motor does not smoke from the tailpipes at all....My ? can we cap the opening or do we need to vac it back to carb?.... or what needs to be done? ANY HELP is cool