I moved the stock tank to the center, made new straps to hold it, added a sump for my fuel injection, and are using the stock filler location. To extend the filler to the tank, I used a 90 degree exhaust elbow and a short piece of 2 1/4" gas hose to connect to the tank. I also welded all but one vent holes, and eliminated the expansion tank in the car. The one vent hole has a gas hose from it to the side of the filler neck where the expansion tank attached. I then drilled two small holes in the gas cap. Everthing works very well!