I am getting ready to hook up the original gas tank in the 51 (Chevy) and I have a question. Is there a shut off valve on the bottom of the tank before it goes to the rubber line? As I said before the truck was in a Basket Case when I got it. All that is on the tank is a 1/4 inch fitting about an 1 1/2 long, and the main gas line is all gone. I have to replace everything from tank to fuel pump.