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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 ...
The big-block engines initially used a forged crankshaft with a stroke of 3.975" for the 1965-1967 425 and 400 CID versions; starting in 1968, both the 400 cu in (6.6 L) and the 455 cu in (7.5 L) big blocks used a stroke of 4.25 in (108 mm), with crankshaft material changed to cast iron except in a few rare cases.
The block entered production in mid 1965 as the Mark IV 396 cu in (6.5 L) "Turbo-Jet," phasing out the first-generation W-series Big-Block. In its first year the 396 was available as the L78 option in Corvettes and full-sized ( Impala , Bel Air , Biscayne ) models, and as the L37 in the intermediate ( Chevelle ) model.
There were a few different versions of the LT1. All feature a cast iron block, with aluminum heads in the Y- and F-bodies, and cast iron heads in the B- and D-bodies. Corvette blocks had four-bolt main caps, while most other blocks were two-bolt main caps. Block castings remained the same between 2 and 4 bolt mains.
The big-block 455 Rocket V8 was discontinued and replaced by a new small-block 403 cubic inch Rocket V8. Transmissions included a three-speed manual (standard and only available with the V6 engine), five-speed manual (coupes with 260 V8 only) or three-speed Turbo Hydra-matic – optional on V6 models, included with the 260 V8 in sedans and 350 ...
Other than that, this engine is vastly different from the Gen-1 model. The Gen-1 engine is physically the size of a big-block Ford or GM engine, and is sometimes called a "big-block". The Gen-2 is closer to the physical size of U.S.-made small-block V8s except for the bore centers, which are the same as some big-block engines.
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Built with a boat V-drive and a rear-facing supercharged Chevy 454 with zoomie headers. Broken at a drag strip event in Dos Palos, CA. [17] 44, 52, Daily Fix: Nov 13, 2016, [18] 72 [19] General Mayhem ‘68 Charger first rebuilt with used motor home parts, including a Mopar 440.
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