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The 1972 Chevelle SS top engine was rated at 270 net hp (201 kW), conforming with GM's decree that all engines would be rated at their net engine ratings. All other engines on the SS roster were unchanged from 1971. 1972 was the last year for the cowl induction option for the 454 cid engine and was not even mentioned in the 1972 Chevelle brochure.
The 400 saw extensive use in full-size Chevrolet and GMC trucks; K5 Blazer/Jimmy, 1/2-ton, 3/4-ton, 1-ton, and even larger 'medium duty' trucks had an option to be equipped with a 400. The engine was available in midsize A-Body and full-size B-Body passenger cars until the end of the 1976 model year. Early models produced 265 hp (198 kW) with a ...
Engine offerings included a new 307 cu in (5.0 L) V8 rated at 200 hp (149 kW; 203 PS) that replaced the 283 cu in (4.6 L) V8 that had served as the base V8 since the Chevelle's introduction in 1964. Inside was a new instrument panel featuring round gauges in square pods similar to what would appear in Camaros the following year.
The 396 cu in (6.5 L) V8 was introduced in the 1965 Corvette as the L78 option and in the Z-16 Chevelle as the L37 option. It had a bore × stroke of 4.094 in × 3.760 in (104 mm × 95.5 mm), [28] [29] and produced 375 bhp (380 PS; 280 kW) at 5600 rpm and 415 lb⋅ft (563 N⋅m) of torque at 3600 rpm. [30]
As mentioned above, the Nova option could not officially have V8 engines at this time—the standard SS engine was the six-cylinder (this was also applicable to the Impala (and later the early Chevelle c. 1964–65) when the SS was a sport and appearance package)—but small-block V8 engine swaps were commonplace among enthusiasts.
From 1964 to 1969, GM Canada produced a special-market version of the Chevelle called the Beaumont, which included Pontiac-type trim and unique front grilles as well as taillight assemblies. When the A-body cars were introduced in 1964, GM had set a corporate policy prohibiting V8 engines larger than 330 cu in (5.4 L) in these models.
Between 1966 and 1969 the L78 was the highest-horsepower engine available in Chevrolet's intermediate line via a Regular Production Option (RPO). Despite this, in 1969 an L72 427 cu in (7.0 L), 425 hp (317 kW) engine could be ordered in an intermediate via a Central Office Production Order (COPO).
Super Sport, or SS, is the signature performance option package offered by the Chevrolet division of General Motors on a limited number of its vehicles. All SS models come with distinctive "SS" markings on their exterior. The SS package was first made available for the 1961 Impala. [1]