The Jeep J20 functioned as a heavy-duty pickup truck which American Motors Corporation built from 1974 through 1987 by utilizing the identical SJ platform as Wagoneer and Cherokee. The Jeep J20 earned its reputation because of its rugged design which received its drivetrain components from other Jeep vehicles. The Jeep J20 could adopt AMC's 6.6L (401 cubic inch) V8 engine between 1974 and 1978 yet it possessed net output ratings between 215–225 horsepower and 320–340 lb-ft of torque. The Jeep J20 model with recommended equipment components enabled towing capability as well as gross vehicle weight rating (GVWR) which reached 8,000 lbs. The Jeep J20 provided customers with two main wheelbases amounting to 119 inches and 131 inches in length. Customers had the option to select between manual or automatic transmissions when they bought their vehicle. Standard part-time 4WD was available but full-time Jeep's Quadra-Trac system could be chosen in specific models. Drivers could choose between Dana 60 or Dana 70 rear axles since they operated with front Dana 44 axles based on specific payload requirements. Disc brakes for the front wheels arrived in 1974 to improve braking functions. The interior cabin of the J20 offered enough space during its time period while customers could select various size fuel tanks that reached up to 22 gallons and optional features. Responses to preserving the reliability of Jeep J20 use factory-approved genuine OEM Jeep replacement parts that keep these models in perfect working order and meet original factory requirements.