Impressed by Amon's driving in the NZ rounds, Ferrari despatched a new four valve version of the 2.4 V6 for the Australian rounds and this gave another 15 hp, but with lesser reliability which combined with the fact Clark was the best driver in the world at the time, cost Amon the series, although in the final round at Sandown Park he duelled wheel to wheel with Clark before being pipped at the line.