If you have gas coming out of the boosters then you probably have a problem with the needle and seat.

It isn't uncommon for these carbs to develop issues if you let them sit for very long with ethanol pump gas in them. I had an old truck that I didn't drive very much with an Edelbrock carb on it and I constantly had to pull the top off the carb and clean it out. The pump gas swill just eats at those carbs if it sits in there for very long.