I would pull the valve covers & make sure the valves are all opining & closing like HRL says. Also look for any valves standing taller then the others. That can indicate a recessed valve seat. If not that it,s looking like the carb. Loop the vacuum hose up high between the carb & dist. That way any gas that gets in will flow back to the carb if the vacuum chamber is not leaking. Same goes for the power brake hose.
