the bodywork, this was a copy of 1950s Mercedes-Benz mechanicals, although the engine was OHV instead of OHC. Construction was by hand, with old-fashioned methods and on a small scale. A 1985 visitor described the process as chaotic, with many body parts rusting before they were even painted - but since the metal was so thick, this was not an issue, as they would still easily outlast the engine and transmission. Variants SH760A In 1974, the SH760A was released. This was a complete redesign of the SH760 with more modern front and rear end design replacing the 1950s styling of the SH760, although the center section was still based from the same Mercedes-Benz model. The powertrain was carried over from the SH760. Air conditioning was developed and approved in 1983, but was not available until 1988 with the SH760B. Production continued until around 1989 with some 49,000 units produced. SH760B Development on a SH760A replacement, the SH760B, was complete by 1980, but the car and its new engine were not available until 1988, after passing evaluation tests in 1987. The SH760B was powered by the Jinfeng 682Q, a new enlarged 2.3 liter version of the 680Q producing 100 horsepower. The model is sold with the SH760A. Two versions were available; one was basically the SH760A but with a black plastic grille while the other featured trim, bumpers, taillights (somewhat modified), steering wheel, mirrors, wheels, and some interior trim pieces straight from the Volkswagen Santana, even though this was in direct contradiction to Shanghai's contract with Volkswagen. The SH760B was produced until 1989 alongside the SH760A. SH760C/D The SH760 is the prototype of a two-door pickup and the SH760D is a prototype of a four-door pickup. SH7221/SH7231 In 1989, China's automotive designation system changed and the SH760A and SH760B were redesignated as SH7221 and SH7231, respectively, but otherwise remained identical to the previous models. Production ended on 25 November 1991, after a total production run of 79,526 cars. Production peaked in 1984 at around 6,000 units. The SH760 was used as a basis for a four-door convertible, a three-door pickup truck from 1991 to 1994, and a five-door station wagon. Few of these mostly handmade derivatives were produced. Proposed replacements A replacement for the SH760 was proposed as early as 1966 with the SH763, followed by the SH762 in 1967. Both models used the same engine as the SH760. In 1974,