If its dry then put some gas in and see if the pump works. At that age there may be some issues, dried out fuel hose, filler hose issues, stopped up vent, dead float/sending unit ect. Or it may be good to go! I would test the fuel station pump first with a few gallons, if it pumps fill it up and see if there are any leaks. You can always pump it out into your car or whatever. You can add a fuel filter for your pump hose too, you can get a water separator with a clear bowel or the all in one spin on filters. I get mine from my local TSC. Goldenrod brand I think.