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The 1972 Chevelle SS top engine was rated at 270 net hp (201 kW), conforming with GM's decree that all engines would be rated at their net engine ratings. All other engines on the SS roster were unchanged from 1971. 1972 was the last year for the cowl induction option for the 454 cid engine and was not even mentioned in the 1972 Chevelle brochure.
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).
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). This option bypassed a rule that existed prior to 1970 wherein intermediate models were restricted to engines with displacements less than 400 cu in (6.6 L).
It produced 385 hp (287 kW) in 1967–68 full-size cars, 390 hp (291 kW) in 1969 full-size cars and Corvettes (by exhaust system). [38] L-68: produced 1967–69, 10.25:1 compression, Tri-Power, nodular iron crankshaft, hydraulic lifters, aluminum oval port closed chamber heads, and two-bolt main caps. It produced 400 hp (298 kW), and was used ...
All SS models come with distinctive "SS" markings on their exterior. The SS package was first made available for the 1961 Impala. [1] Some of the other models bearing the SS badge include the Camaro, Chevelle, El Camino, Impala, Monte Carlo, Nova and Chevrolet Pickup Trucks. Current SS models are produced by the GM Performance Division.
The 1967 & 1968 427 Camaros were so popular that, in 1969, Yenko used Chevrolet's Central Office Production Order (COPO) system to have L-72 engines installed into Chevrolet Camaros and Chevelles. During 1971 and 1972, Yenko sold Yenko Stinger Vegas.
Introduced in 1963 on Pontiac's 389 and 421 cu in (6.4 and 6.9 L) drag racing engines, General Motors fitted it to the 1967 Z/28 before they used it on the L88 427 cu in (7.0 L) Corvette. It eliminated the production breaker-point ignition allowing greater spark energy and more stable ignition timing at all engine speeds including idle.
Chevrolet C/K (1967-1972) Chevrolet Chevelle (1967-1968) Chevrolet Nova (1967-1974) Chevrolet Corvette L88 (1967) Chevrolet Impala SS427 (1967-1969) Chevrolet Sportvan (1967-1970) Chevrolet Suburban (1967–1972) Chevrolet Van (1967-1970) Dodge A108 (1967–1970) Dodge Coronet R/T 426 Hemi Convertible (1967) Dodge Coronet W023 (1967) Envoy Epic ...