![]() ![]() 454ci/L19/EFI: Chevrolet phased big-blocks out of passenger cars as emissions and fuel standards went into place in the late 1970s.An LS7 version-not the modern LS model-offered in the Corvette and as a dealer performance option is rated at 465 hp and 610 lb-ft. 454ci: Chevrolet added the 454 in 1970, with the same bore but slightly more stroke than the 427 at 4 inches.It features the big-bore block at 4.25 inches but the same 3.760-inch stroke as the 366/396. It was rated as high as 435 hp and 460 lb-ft of torque. 427ci: The 427 can be found with hydraulic flat-tappet lifters in family cars or with high-revving solid lifters in the Corvette.402ci: The 396 was bored to 4.126 inches to make 402 ci in 1970, although Chevrolet continued to market it as the 396.It uses the same bore as the 366 but a longer 3.760-inch stroke. 396ci: First introduced as a high-output version for the 1965 Corvette, the 396 is rated at 425 hp with a solid-lifter cam. ![]() Today the 366/396ci is not desirable for hot rodding, as they're small-bore, although HOT ROD did build one once. 366ci: Found in medium trucks and school buses of the era, the first Mark IV features 9.4:1 compression and 4x3.62-inch bore and stroke. ![]()
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