Hi Guys I bought a gas tank off ebay a few months ago. I dont remember the size of the gallons it takes. i need to buy a new pickup tube and want to get the right size. I dont know if its a 15 gal or 11 gal. Is there a way to tell by dimensions of the tank? I could start adding gallons of water. The car is a year from being done,so the water will evaporate way befor the car is done.