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The 350 2-barrel V8 of 145 hp (108 kW) was the base Laguna engine. Options for any Chevelle included a 350 4-barrel V8 of 175 hp (130 kW) and a 454 4-barrel V8 rated at 245 hp (183 kW). Hardened engine valve seats and hydraulic camshafts made these engines reliable and allowed them to accept the increasingly popular unleaded regular gasoline.
All engines in this family share the same block dimensions and sometimes even the same casting number; the latter meaning engines were of the same block, but with different strokes (e.g., the casting number 3970010 was used by all three engines: 302, 327, and 350). This engine family was updated in 1968 for the use of 2.45 in (62.2 mm) medium ...
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.
Chevrolet introduced the 350 cu in (5.7 L) LT-1 in 1970, making it available in both the Corvette and Camaro. It was an optional engine in the Corvette, and available as part of the high-performance ZR-1 option. Between 1970 and 1972, only 53 ZRs were produced, making it one of the rarest Corvettes.
The engine had MPFI (multi-port fuel injection), which gave slightly more power and better fuel economy, and two valves per cylinder. The engine had a bore and stroke of 4 + 1 ⁄ 4 in × 4 in (108.0 mm × 101.6 mm), producing 290 hp (216 kW) at 4000 rpm and 410 lb⋅ft (556 N⋅m) at 3200 rpm. It was used by Mercury Marine, named the ...
8. 1970 Chevelle SS 454 LS6 ... you can probably pick up a car with the same specs for five figures rather than seven. ... $3.95 million. With a modest 289ci V-8 engine boasting 350 horsepower ...
The 250 engine continued to be used in GM trucks until 1984, after which it was replaced by the 4.3 L V6 (essentially a 350-cubic-inch (5.7 L) Chevy small-block V8 with the two rear cylinders removed). It was also used in a number of large sedans by Chevrolet of South Africa until 1982.
Mexican versions came in three trim levels (Chevelle, Malibu and Malibu Classic) and two body styles (sedan and coupe) with the 250 cu in (4.1 L) I6 as basic engine and the 350 cu in (5.7 L) 260 hp (194 kW) V8 as the optional; this engine was standard on Malibu Classic models during those three years.