I beleive from your question, your asking about the needle below the changable squirter nozzels, correct? Yes it should move freely, and tipping the carb upside down, it should fall right out. A little carb cleaner should free everything up. A race refresh kit from quick fuel will come with those and the other basic stuff that goes from sitting around the garage.
If your talking about the ball underneth the pump arm in the accelerator pump housing, I use a dremel with a very small soft brissle brush and carb cleaner to clean those up. Sour fuel can gum everything up, so be generous with the carb cleaner.