The car wasn't running when I got it. Gonna take the tank out this weekend to see what shape it's in. Most of the rust has been superficial minus the floor pans.Since you are draining the tank you might as well remove it completely. Check for rust and a good time to replace the lines and hoses. Did the gas gauge work? Fixable when it is out. If the tank is good you can extend it's life by painting with POR-15 and then undercoating it.