[sean1969c10]

If you have power brakes they need to be connected to the booster, make sure that hose is in good shape. You need to have the vacuum advance connected and the PCV needs to be connected to vacuum too, you also need to make sure the crankcase has a way to pull in fresh air. The massive leak Gary is talking about could be between the carb and the manifold, the manifold and heads or any of the vacuum hoses if they are old. You can spray some carb cleaner around the base of the carb and along the manifold gaskets, if the idle picks up then that is where your leak is. Hope this helps.