Dana 44 center section, that proved troublesome, did not sell well, and the option was deleted in 1965. Most likely very few were produced with this option. Gladiator trucks were available as: Cab and Chassis; Wrecker; Stake Bed; and chassis-mounted campers with extended wheelbases. The load bed options were Townside, Thriftside (a conventional bed, similar to a Ford "Flareside" or Chevrolet "Stepside"), and Stake Bed, with up to G.V.W. and almost two-ton payload capacity. A new overhead cam Jeep Tornado engine straight-six producing was standard. It was the first production overhead cam engine in an American light truck or SUV and one of the first OHC engines offered by an American manufacturer. Further innovations for four-wheel-drive pickups included optional automatic transmission (an industry first), as well as power brakes, power steering, and just like early post-war Jeeps a power take-off for numerous accessories that included snow plows and push plates. In early 1963, Willys Motors changed its name to Kaiser Jeep Corporation. During 1965 the AMC V8 engine became available. It produced and of torque at 2600 rpm. The standard Tornado engine was replaced by American Motors' OHV inline six. In 1967 all (RWD) two-wheel drive versions, except for the J-100 panel delivery, were dropped due to poor sales. For 1968, the flared-fender Thriftside models were dropped while a new camper option was added for the J-3600. From 1968 to 1971 Jeep pickups offered the Buick Dauntless V8 as an optional engine. American Motors Corporation (AMC) purchased the Kaiser Jeep operations in 1970 when Kaiser Industries decided to leave the automobile business. The Jeep trucks moved to all AMC engines to improve performance and standardize production and servicing. The Buick engine was replaced by the or AMC V8s. In 1970, the Gladiator's front grille was changed to the same design as the Jeep Wagoneer SUV. This was the truck's first styling change since its introduction. An AMC badge was also added on the grille. Jeep pickup 1971–1988 The Gladiator name was dropped after 1971, after which the line was known simply as the Jeep pickup or J-series. The pickups were designated as J2000 and J4000 models (the 3000 series was dropped in 1971) until 1973, then as J10 and J20 models from 1974 to 1988. From 1971 to 1972 Jeep pickups offered the AMC V8 as an optional engine. The AMC I6 engine was introduced in 1972 and offered through