The horse that always seems to be left out of discussions of that season is Asgard.
He raced in Adelaide, Melbourne, Sydney, Perth and Brisbane and had 26 starts as a 3YO winning ten races including the Australasian Champion Stakes, the WATC Derby (defeating Leica Lover and Imagele), the STC Tulloch Stakes (defeatimg Dalrello) and the QTC Grand Prix.
And he was an entire. Times change.
In 36 subsequent starts he won only 2 other races, both modest races at Morphettville. He produced no off spring.
Others of that 1970 crop included Authentic Heir, Dalrello, Bush Win, Purple Patch, Reckless, Think Big, Leilani, Zephyr Bay.