Dean Capobianco is 2nd all-time Australian at 200meters in 20.18.
John Dinan is 3rd at 20.19
Could not find a time for him in the 100m.
Here is more info from Australian & New Zealand Olympians: The Stories of 100 Great Champions (Graeme Atkinson) (skipping the description of the 1968 controversy):
... An asthma sufferer, Norman has almost the slowest start in athletics, but possessed one of the most paralyzing last 80 metres ever seen in 200 metres running.
He lined up for his first A grade club race in 1958. His idol, Hec Hogan, was in the field and left Norman for dead, but only four years later, the young Collingwood athlete was in his first Australian team. He then drifted along in athletics for a few years while runners such as Holdsworth, Eddy, and Lay went ahead of him.
Norman came to the fore again with a victory in the 1966 Australian national 200 metres (the first of 5 in succession) and was selected for the Mexico City Games. It was thought unlikely that he would fare well but he set a new Olympic record in his heat and qualified easily for the final.
[Description of 1968 200 race]
A bad knee resulted in only 3rd place in the national title in 1972 and although he was still inside the Olympic qualifying time, Norman was not selected for the Munich Olympics. That same year he was involved in a sensation at the Victorian state titles when he was placed second in the 100 metres although news photos showed him a half yard to the good in lane one (nearest the judges, a position in which runners are sometimes missed). Angry, Norman threw his silver medal into the lap of the chief judge. Soon after, he was suspended for two years for failing to lodge a manager's report after taking a sub-junior side to Brisbane.
Keeping fit with football, Norman made a short-lived comeback in 1976, at which time his Australian record for the 200 metre (20.5 in 1968 and 1971) still stood (?!? -what about 1968). But although he had hopes of qualifying for the Montreal Games, he soon dropped out of athletics.