The 1983 championship saw the debut of the Bap Romano owned and driven Kaditcha K583 Cosworth, the first Australian Group A Sports Car built with a closed top and Ground effects aerodynamics.
Queensland based owner/driver Bap Romano won the series driving his Romano WE84 Cosworth from 1982 champion Chris Clearihan (driving the Kaditcha-Chevrolet that Peter Hopwood used to win the 1983 Championship) and Andrew Roberts driving a self designed Roberts S2 Ford.
It was the last ever of 155 grand prix wins for the 3.0L Cosworth DFV V8 engine which had made its debut back in 1967 when legendary Team Lotus boss Colin Chapman matched his Lotus 49 with the engine.
The March 76S 3.0 DFV is a unique 3.0 Cosworth DFV powered March 76S, acquired privately by Guy Edwards for himself and John Lepp to drive in selected rounds of the 1976 World Sportscar Championship.