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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.
The 350 cu in (5.7 L) base engine (ZQ3) remained at 300 hp (224 kW) and the L46 was again offered as a 350 hp (261 kW) high performance upgrade. New was the LT1, a 350 cu in (5.7 L) small-block V8 engine delivering a factory rated 370 hp (276 kW).
The L81 was the only 5.7 L (350 cu in) Corvette engine for 1981. It produced 190 hp (142 kW) and 280 lb⋅ft (380 N⋅m) of torque from 8.2:1 compression, exactly the same as the 1980 L48, but added hotter cam and computer control spark advance, replacing the vacuum advance. [22] The L81 was the first Corvette engine to employ a "smart carburetor."
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 a hydraulic-lifter camshaft.
Shelby installed a 427ci V-8 engine into a fastback Mustang, likely producing a 520-horsepower ride. It remains one of a kind — and sold accordingly at auction. 4. 1970 Dodge Charger Daytona
Only 53 of these packages were optioned during the 1970 to 1972 model years. For the 4th generation (C4) , the ZR1 was the top-tier package that was available from 1990 to 1995, with a special engine designed in partnership with Lotus, after General Motors acquired Group Lotus , and with the objective of creating the world's fastest production car.