The 1973 Sandown Park Cup was the seventh round of the 1973 Tasman Series. It was a Formula 5000 race held at Sandown International Raceway. It was held on the 18th of February on the same circuit that would in November be used for the 1973 Australian Grand Prix. New Zealander Graham McRae won the race and went on to win the Grand Prix as well.
References
1973 Sandown Park Cup Wikipedia(Text) CC BY-SA