MTS Company 0011 High Density Polyethylene Fuel Tank 1962-1977 Jeep pickup (exact fit 1973-1977) 18 gallon fuel tank MTS replacement tanks are molded in one piece and have no welds or seams to split apart and will never rust through. Made of High Density Cross Linking Polyethylene, a high strength material with superior puncture resistance. Will not crack even at 160 degrees below zero.