improved production (Australian Group C). The car had modified suspension just before release to also be used in local Series Production racing (Australian Group E). 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 . 350 The , with a stroke, first appeared as a high-performance L-48 option for the 1967 Camaro. The exact displacement is . One year later it was made available in the Chevrolet Nova, and finally in 1969 the rest of the Chevrolet line could be ordered with a 350. As had been the case with earlier versions of the small-block, the 350 was available in the Beaumont sold by Pontiac Canada, which unlike its US counterparts, used Chevrolet chassis and drivelines. Many variants followed. L46 Years: 1969-1970 The L46 became an optional engine for the 1969 Chevrolet Corvette. It was a higher performance version of the base V8 with casting number 186 valve heads and had an 11.0:1 compression ratio requiring high octane gas and produced (SAE gross power). It was also available in 1970 with 4bbl Quadrajet carburetor and L46 hydraulic cam, dome piston (+), 186 heads, and a four-bolt block. L48 Years: 1967–1980 The L48 is the original , solely available for 1967 in the Super Sport (SS) version of Camaro (1967-up) or Chevy II/Nova in 1968–1979. In 1969 it was used in almost all car lines; Camaros, Caprices, Impalas, El Caminos, Chevelles & Novas. The 1969 L48s use a hydraulic cam, 4bbl Quadrajet carburetor, cast pistons, 4-bolt main casting number 010 Blocks & casting number 041 or 186 heads. Power output was SAE and torque. Compression ratio was 10.25:1. The compression ratio of the L48 was lowered to 8.5:1 in 1971. In 1972 the L48 (4bbl V8) option for the Nova was part of the SS package. This is indicated by the fifth digit in the VIN being a K. Nineteen seventy-two was the only year the SS package could be verified by the VIN. The L48 engine was exported to Australia, where it appeared in the Holden Monaro from 1969 through 1974, and in the Statesman from