The L72 was a 427 cu in (7.0 L) 90° overhead valve V8 big-block engine produced by Chevrolet between 1966 and 1969. Initially rated at 450 horsepower, the rating dropped to 425 hp (317 …

Aug 16, 2010 · Just How Powerful Were Corvette's Early Big-Blocks? Early in the '66 model year, the 427ci L72 engine was rated 450 hp at 6,400 rpm. Not long after production began, the …

Mar 14, 2024 · This Chevrolet L72 engine is a 427ci V8 of the type produced in 1969 for use in the Corvette and high-performance full-size models as well as COPO Chevelles and Camaros. …

1966 with 4 Barrel Carb (L72) (High Compression Model) Max Brake Horsepower: 425 @ 5600 rpm Max Torque: 460 @ 4000 rpm Stroke: 3.76 Bore: 4.251 Compression: 11.0 Firing Order: …

The 427/425 HP L72 engine was the pinnacle of performance for Chevrolet in 1966. Even though it was the top engine in the Chevrolet line-up, only 1856 L72 full-size cars were produced out …

Sep 24, 2018 · The L72 427 engine was rated at 425hp at 5,600 RPM and 460-lbs ft of torque at 4,000 RPM. Its bottom end featured a 4.251-bore four-bolt-main block (casting number …

Dec 22, 2017 · No other engine in muscle car history lost 25 hp simply by switching air cleaner labels, but that's the story of Chevrolet's 1966 427ci L72 big-block. When introduced for duty …

Sep 17, 2007 · In 1967, Chevy broke that rule by rating the L71 (triple 2-barrel carb, solid lifter 427) engine at 435 horsepower. The L71 was identical to the 1966 L72 except for the …

Aug 27, 2022 · In 1966, the Chevy L72 427 was the most powerful engine option available in the Corvette. The initial 450 horsepower rating made the L72 the engine to have throughout its …

Jan 11, 2023 · The L72 was the top dog engine for 1968 full-size Chevys, sporting serious hardware throughout. 425 horses were the result of 11:1 compression, a healthy solid-lifter …