Fitment: For Ford F-350 7.3L 1994-1997 Specification: 1994-1997 For Ford Full-Size Pickup sending unit for the 23 gallon REAR PLASTIC fuel tank w/ a DIESEL ENGINE. This unit does NOT include the plastic nut used to secure the sending unit to the tank but it does include a new O-ring. This unit will NOT work with gas engines. Verify that your wiring harness plug connector matches the one in picture #2. Professional Installation is highly recommonded. Package: 1*Diesel Sending unit for the Rear Plastic fuel tank .