The Chevrolet Chevy II / Nova is a small automobile manufactured by Chevrolet, and produced in five generations for the 1962 through 1979, and 1985 through 1988 model years. Built on the X-body platform, the Nova was the top selling model in the Chevy II lineup through 1968. The Chevy II nameplate was dropped after 1968, with Nova becoming the nameplate for all of the 1969 through 1979 models. It was replaced by the 1980 Chevrolet Citation introduced in the spring of 1979. The Nova nameplate returned in 1985, produced through 1988 as a S-car based, NUMMI manufactured, subcompact based on the front wheel drive, Japan home-based Toyota Sprinter.
Third Generation (1968-1974):
The 1968 models were fully-redesigned with an extensive restyle on a longer 111-inch wheelbase that gave Chevrolet's compacts a chassis that was just one inch shorter than that of the midsize Chevelle coupe. The station wagon and hardtop sport coupe were discontinued, the former in line with an industry trend which left AMC the only American maker of compact station wagons until Chrysler rejoined the market in 1976 (the 1966–70 Ford Falcon wagon was actually midsize, using a bodyshell identical to the Fairlane wagon's). One notable change was the front subframe assembly — as compared with Ford, Chrysler and AMC, in whose cars the entire front suspension was integrated with the bodyshell, a separate subframe housing the powertrain and front suspension (similar to the front part of the frame of GM's full-size, full-framed vehicles) replaced the earlier style. Although the front subframe design was unique for the Nova, the Camaro introduced a year earlier was the first to incorporate such a design; the redesigned Nova was pushed a year ahead to 1968 instead of 1969. The sales brochure claimed 15 powertrain choices for coupes and a dozen for sedans. Options included power brakes and steering, Four-Season or Comfort-Car air conditioning, rear shoulder belts, and head restraints. There were a few Chevrolet Novas built with the 194 ci (3.1 L), the same engine that had been used in the previous generations of the Chevy II. Sales of the 1968 Chevy II Nova fell by half.
In 1969 Chevrolet dropped the Chevy II portion of its compact car's name; it was now known simply as the Chevrolet Nova. The 153 cu in (2.51 L) four-cylinder engine was offered between 1968 and 1970, then was dropped due to lack of interest (besides its other usage in the Jeep DJ-5A a.k.a. the Postal Jeep or a marine/industrial engine) and to clear the field for the Vega. Far more popular were the 230 cu in (3.8 L) six-cylinder and the base 307 cu in (5.03 L) V8, which replaced the 283 cu in (4.64 L) V8 offered in previous years. Several units were produced with the 327 cu in (5.36 L), 275 hp (205 kW), engine, four-barrel quadrajet carb and four-speed Saginaw transmission with a heavy-duty 12-bolt positraction rear as a "towing option' package. At mid-year, a semi-automatic transmission based on the Powerglide called the Torque-Drive (RPO MB1) was introduced as a low-cost option (~$100 less than the Powerglide) for clutchless motoring. The Torque-Drive transmission was only offered with the four and six-cylinder engines. The two-speed Powerglide was still the only fully-automatic transmission available with most engines, as the more desirable three-speed Turbo-Hydramatic was only available with the largest V8 engines.
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