diesel turbo engine. CJ-5 The Willys CJ-5 (after 1964 Jeep CJ-5) was influenced by new corporate owner, Kaiser, and the Korean War M38A1 Jeep. It was intended to replace the CJ-3B, but that model continued in production. The CJ-5 repeated this pattern, continuing in production for three decades while three newer models appeared. "The CJ-5 has the distinct honor of being a vehicle that was hard to kill off... equaling the longest production run of note." From 1961 to 1965, optional for the CJ-5 and CJ-6 was the British-made Perkins Diesel I4 with at 3,000 rpm and at 1350 rpm. In 1965, Kaiser bought license to produce the Buick V6 Dauntless engine, to offer the new option on the CJ-5 and CJ-6, countering complaints that the 75 hp four-cylinder Willys Hurricane engine was underpowered. Power steering was an $81 option. The V6 engine proved so popular, by 1968, some 75% of CJ-5s were sold with it. Kaiser Jeep was sold to American Motors Corporation (AMC) in 1970, and the Buick engine was retired after the 1971 model year. (GM's Buick division repurchased the engine tooling in the early 1970s which served as the powerplant in several GM vehicles.) The "Trac-Lok" limited-slip differential replaced the "Powr-Lok" in 1971, and PTOs were no longer available after that year. AMC began marketing the Jeep less as a universal utility vehicle, and more as a sporty one, notably increasing its performance and features. 1972 Revamp The 1972 model year brought significant changes to the CJ-5. American Motors began fitting their own engines, which also required changes to both body and chassis. The base Willys 4-cylinder was replaced by AMC's Torque Command straight-6 engines, giving the entry-level CJ-5 the power of the previously optional Buick V6. Standard became the , and optional the , which was standard in California. Both engines used a one-barrel Carter YF carburetor. Also in 1972, AMC's V8 engine became available, which upgraded the power-to-weight ratio to a level comparable to a V8 muscle-car. Other drive-train changes included a new front axle - a full-floating, open-knuckle Dana 30, which was both 25 lbs lighter and reduced the turning circle by 6 ft. To accommodate the new engines, the wheelbase was stretched by , and the fenders and hood were stretched by , pushing the firewall two inches closer to the rear. A new box-frame was fitted, featuring six cross-members for more