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The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline-powered, V8 engines that was developed and have been produced by the Chevrolet Division of General Motors from the late 1950s until present. They have powered countless General Motors products, not just Chevrolets, and have been ...
This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in 3 (1980-1983).
While similar in displacement to the other 4.3–4.4 L (265–267 cu in) V8 engines produced by General Motors (including the Oldsmobile 260 and Pontiac 265), the small bore 267 shared no parts with the other engines and was phased out after the 1982 model year due to inability to conform to emission standards. Chevrolet vehicles eventually ...
In 1967 the 421 was enlarged to 426.61 cu in (7.0 L) by increasing its bore to 4.12 in (104.6 mm). Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. It retained the 421's 4 in (101.6 mm) stroke and 3 + 1 ⁄ 4 in (82.6 mm) main journal.
Chevrolet Performance, formerly "GM Performance Parts", is an automotive performance parts brand that sells everything from camshafts and cylinder heads to high-performance crate engines and upgrades for late-model Chevrolet vehicles. It was founded in 1967 to support the Trans-Am Camaro race teams.
For 1990, Chevrolet debuted the 454 SS as a high-performance variant of the C1500. 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.