This is actually much easier than it sounds. Run the pressure line from the exhaust to the pressure input fitting on the original tank (so leave it where it was). Take the fuel line loose at the carb. and put it into the pressure inlet fitting on your second tank. Take the output line from the second tank and go to the carb. There, now you have a complete pressurized system. If you use the Hayes 2oz tank, you can use a clunk weight inside the tank and your truck will idle forever without leaning out and dying when it lands upside down. [8D]