Really old gasoline question

[History]

I've just recently tried to use a truck and fire up an 87 gt mustang I've let sit for several years. Yeah I know I'm a moron that just let it get away from me. I tried using the truck, 3500 chevy 4x5 dump. I wound up having to take the tanks out and trash them on both vehicles. I'd let them sit in an insulated shop with about a quarter tank of gas in both. Everything above the line of gas rusted like crazy. The smell of that old gas could start wars.