Old gas in '78 Dodge van

Before you change out the pump it might be a good idea to pull the line off at the carb just to be sure it isn't pumping. I changed the pump on a /6 thinking it was bad but it still wouldn't fill the carb bowl. The problem was the needle was stuck and wouldn't let gas into the carb. :angry7:
I would think it should run on 3 year old gas but probably not too well. I would put a clear filter on it so I could see what was coming through. The gas we have now with alcohol in it will cut loose any junk in the tank and lines.
Dallas