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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 kW) shortly after its release (although there was no change in power).
This engine was identical to the 425 hp (317 kW) L72 427 (first introduced in 1966), but was fitted with 3×2-barrel Holley carburetors, [32] known as "Tri-Power," in lieu of the L72's single 4-barrel carburetor. Both engines used the same high-lift, long-duration, high-overlap camshaft and large-port, cast-iron heads to maximize cylinder head ...
Between 1966 and 1969 the L78 was the highest-horsepower engine available in Chevrolet's intermediate line via a Regular Production Option (RPO). Despite this, in 1969 an L72 427 cu in (7.0 L), 425 hp (317 kW) engine could be ordered in an intermediate via a Central Office Production Order (COPO).
The 427 cu in (7.0 L) Chevrolet L72 big-block engine became available in the mid-sized Chevrolet Chevelle in 1969 as the COPO 427 option. The 427 Chevelle could run a 13.3 sec. quarter-mile at 108 mph (174 km/h). Chevrolet rated the engine at 425 hp (317 kW), but the NHRA claimed power output to be 450 hp (340 kW). [71]
The first-generation Chevrolet Camaro is an American pony car introduced by Chevrolet in the fall of 1966 for the 1967 model year. It used a brand-new rear-wheel-drive GM F-body platform and was available as a 2-door, 2+2 seat, hardtop , and convertible .
The RPO L36 was rated at 385 hp (287 kW), the L72 at 425 hp (317 kW). The L72 was only available with a manual transmission. The 1966 Impala was a mild restyle of the 1965, featuring a new instrument panel, grille, wheel covers (except for SS models), and rectangular taillights that wrapped around to the side of the quarter panels.
1962–2009 Buick V6 (marketed as "Fireball V6", "3800", "Dauntless V6" in 1966-1971 Jeeps, and "Ecotec" in Holdens) 1977–2013 Chevrolet 90° V6 engine (derived from the Chevrolet Small-Block" V8; now marketed as GM Vortec V6 or Vortec 4300 or EcoTec3 V6) 1979–2010 Chevrolet 60-Degree V6
Only about 400 Super Sports had a six-cylinder engine from 1967 to 1968, 390 hp (291 kW; 395 PS) in 1969, or L72 (425 hp (317 kW; 431 PS)) from 1968 to 1969. Special SS427 badging, inside and out, was the rule, but few were sold, since muscle car enthusiasts were seeking big-block intermediates, such as the Chevelle SS396 and Plymouth Road Runner .