The fuel tank is mounted on the car frame) on the extension of the frame rails behind the rear axle) and fixed with two steel clips that are hinged at one end and bolted and nuted on the other. In this case, as with other assemblies touching on the fuel provision, it is advisable to firstly detach the battery. The fuel gauge wiring at the top of the tank should be disconnected; on the early models, the wire is accessible through the trunk above the rear seat, you remove the rubber grommet and pull the wire through the trunk floor pan. In the case one wants to access an area underneath a given vehicle then the vehicle should first be lifted. The fuel tanks can be emptied through the filler neck, or via the fuel feed line to the carburetor, but bowh there is no way to provide a drain plug; while doing so, safety measures are to be followed up and it is strictly prohibited to use mouth suction to suck the fuel and no flame or spark is to be brought close to the fuel area. The fuel hose or vapor return hose at the top should be removed together with the gauge ground wire which is screwed to the under body and the filler neck must be detached from the tank. Place a jack and a piece of wood to support the bottom of the tank, then unbolt the tank strap bolts and let the tank slowly down while checking that all connections that you have are loose as the tank comes down. In terms of installation the process should be basically the opposite of the removal process, there should be meticulous checking of all electrical connections to see to it that they are clean and well connected securely and all the hoses should be well tightened on the tank.