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The ZZ632's iron block shares a mold with Chevrolet Performance's ZZ572 crate engines, but the castings are machined to accommodate the huge 632 cubic-inch displacement. The bore grows by 0.040 in (1.0 mm), compared to the 572-cubic-inch V8s, with most of the displacement gain coming from a stroke that is 0.375 in (9.5 mm) longer.
The newest American high-performance pickup truck since the 1989 Shelby Dakota, the 454 SS was a 1 ⁄ 2-ton C1500 powered by a 230 hp (172 kW) 7.4 L V8. Deriving much of its design from the Sport Equipment Package, the 454 SS was distinguished by a nearly monochromatic black exterior, gloss-black grille (with red-trim badging), and body-color ...
Chevrolet Performance released the 454 again in 2011 as a small-block crate engine dubbed the LSX454R officially rated at 776 horsepower at 7,000 rpm and 649 lb-ft of torque at 5,100 rpm. The LSX454R was discontinued in July 2018 and was recorded as one of the more powerful LS crate engines to be assembled from Chevy Performance.
The engines were essentially unchanged, but an industry-wide switch to SAE net hp numbers reduced the rated power of all Chevrolet engines. Chevrolet did not list gross horsepower figures for 1972. Compared to the 1971 model year output, only the 402 and 454 had a decrease in power. The new ratings for the Monte Carlo were:
The gasoline engines that were offered in the medium-duty trucks were the Chevrolet 250 and 292 inline-sixes alongside the 350 small-block V8 and the 366, 427, and 454 big-block V8s. A very rare option was GMC's DH478 "ToroFlow" 478-cubic-inch diesel V6, which was offered only in 1973.
The 454 engine option was available for the first half of the model year in the Chevelle and thus the 1975 Laguna had the 400 as the top engine. The 49-states' engine line-up was - the standard 145-horsepower 350 two-barrel V8, the optional 175-horsepower 400 four-barrel V8, and the 215-horsepower 454 four-barrel V8.
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Chevrolet's largest and most-powerful engine of the time was also put into a select few El Caminos. The LS6 454 CID engine, rated at 450 hp (336 kW) and 500 lb⋅ft (678 N⋅m) of torque, gave the El Camino 1/4-mile times in the upper 13-second range at around 106 mph (171 km/h). [citation needed]