Magic Circuit.
Talking about crowds as I recall they attracted around 60,000 for the AGP when it was held there as part of the Tasman Series, and matched that for the single race ATCC won y Pete Geoghan later on.
That figure may have been exceeed for some of the ATCC rounds held there, particularly in the Moffatt, Brock, Johnson era. Looking out over the back of the cicuit right round from Torana Hill down through the back of Hungry up to the top of the look was just solid people.
Great Circuit, great viewing, and a real challenge to drive, deserves it's Heritage status.