78-80 C10 Big Ten Driver or Passenger Side, GAS, 16 Gallon, Ahead Of Rear Axle, 42-7/8 x 14-1/8 x 11, Lock Ring Kit Included. 75-80 C10 (submodel: Cheyenne, Custom Deluxe, Scottsdale) Driver or Passenger Side, GAS, 16 Gallon, Ahead Of Rear Axle, 42-7/8 x 14-1/8 x 11, Lock Ring Kit Included.