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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.
A special build 327 was built for GMH for the final run of the HK GTS327 by the Canadian McKinnon Industries. It was a lower compression version of the 1968 engine first used on the HK GTS327, and was dressed as a 1969 engine sporting all 1969 parts. The 327 was replaced in the mid-1969 HT Monaro by the 350 L48 developing 300 hp (224 kW).
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).
In Canada, Beaumont offered an equivalent model, the Sport Deluxe (SD). For 1966, the SD was combined with the Chevrolet 230 cid six- cylinder, 283 or 327 cid small-block V8, or 396 cid Mark IV big-block V8, along with the same optional bucket seats/console package as the Chevelle SS 396, along with unique trim and emblems.
There were other major differences between the Turbo-Thrift engine and the Stovebolt: Bore spacing matches the Chevrolet small-block V8's 4.4 inches,; Stroke of the 194 and 230 engines is the same 3 + 1 ⁄ 4 in (82.6 mm) as the 327 small-block and 348 big-block V8s
The Malibu SS was replaced in 1966 by a new Chevelle SS-396 series that included a big-block 396 cu in (6.5 L) V8 engine (Canadian market did not receive the SS396 but marketed the former Malibu SS nameplate until January 1967 when it was phased out), heavy duty suspension and other performance equipment.