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The Firebird Esprit and the Firebird Formula came standard with the 255 hp (190 kW), 350 cu in (5.7 L). The Esprit could be upgraded to a two-barrel carbureted 400 cu in (6.6 L), 265 hp (198 kW), while the Formula could be optioned to receive the L78 4 barrel 400 that produced 330 hp (246 kW) or the L74 Ram Air III 400 345 hp (257 kW).
The Firebird Esprit and the Firebird Formula came standard with the 255 hp (190 kW) 350 cu in (5.7 L). The Esprit could be upgraded to a two barrel carbureted 400 cu in (6.6 L)265 hp (198 kW), while the Formula could be optioned to receive the L78 4 barrel 400 that produced 330 hp (250 kW) or the L74 Ram Air III 400 345 hp (257 kW).
The 4.8L and the 5.3L are smaller truck versions of the LS1 and were designed to replace the 305 and the 350 in trucks. The 4.8L and 5.3L engines share the same Gen III LS-series engine block and heads (upper end) and therefore, most parts interchange freely between these engines and other variants in the LS family.
After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6.6 L). Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the 455 engine, it was re-introduced mid-year as an available option for the 1975 Pontiac Trans Am.
[citation needed] The 1997 model year Camaro and Firebird were the last year for this engine in a GM production car before it was replaced by the LS1, which was already in the Corvette for 1997. The 1992 LT1s in Y-body Corvettes were factory rated at 300 hp (220 kW) and 330 lb⋅ft (447 N⋅m). 1996 LT1 Corvettes were rated at 300 hp (220 kW ...
An LS swap is a type of engine swap using any form factor of General Motors's LS V8 engine series. [1] [2] Motor Trend noted in 2020 that "the Chevy LS V-8 engine has become the de facto engine swap suggestion for anyone seeking to add power to their existing platform" due to the engine's relatively compact size and light weight. [3]
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Also called the GM small corporate pattern and the S10 pattern. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations.
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