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The engine was available through mid-1965, when it was replaced by the 396 cu in (6.5 L) 375 hp (280 kW) Mark IV big-block engine. In addition, a 340 hp (254 kW) version of the 409 engine was available from 1963 to 1965, with a single 4-barrel cast iron intake mounting a Rochester 4GC square-bore carburetor, and hydraulic lifters.
In 1964, horsepower increased to 365 hp (272 kW) for the newly named L-76 version, and 375 hp (280 kW) for the fuel injected L-84, making the L-84 the most powerful naturally aspirated, single-cam, production small-block V8 until the appearance of the 385 hp (287 kW), 395 lb⋅ft (536 N⋅m) Generation III LS6 in 2001. This block is one of ...
The 400 and 454 engines were optional. The 454 was available with GM's THM-400 automatic or Muncie 4-speed manual transmission. Unitized 3-point seat belts were introduced on all Chevrolet models. 1974 Chevelle Malibu Estate. The upscale luxury trim level for 1974 was the new Malibu Classic, offered in sedan, coupe, and station wagon models.
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.
Power and performance were reduced. Engine offerings for 1971 included the 250-6, small-block V8s of 307 and 350 cubic inches; and big block V8s of 402 and 454-cubic-inch displacements. Horsepower ratings of those engines for 1971 ranged from 145 for the six to 365 for the RPO LS5 454 – all in gross figures. The LS6 454 V8 was gone forever.
The 425's stroke was lengthened to 4.25 in (108 mm) to achieve 454.6 cu in (7.4 L; 7,450 cc) to create the Rocket 455 for 1968. It kept the retired 425's 4.126 in (104.8 mm) bore to produce between 275 and 400 hp (205 and 298 kW). Initially the paint was red, except for metallic blue in the Toronado applications; 1970-1976 versions were ...
NASCAR officials set the rules configuration for a majority of tracks on the 2022 Cup Series schedule Tuesday, announcing that the Next Gen car will use a 4-inch rear spoiler for downforce and ...
Optional engines included a 175 hp (130 kW) 350 cu in (5.7 L) with a four-barrel carburetor and a four-barrel carbureted 454 cu in (7.4 L) "Turbo-Jet" V8 rated at 245 hp (183 kW). The 1973 Monte Carlo was named "Car of the Year" by Motor Trend based on its new styling and emphasis on Euro-style ride and handling.