Reminds me of the 1976 Laurie Boulter Memorial race in South Australia that we raced in.
Five rows about 75 riders all trying to get round the first corner. Scary stuff ;D
Here is a picture of me riding over Dave Basham's bike in the first turn of one of the legs.
Stan.
(http://i991.photobucket.com/albums/af39/gf079/Gregs%20pictures/LaurieBoulter19762b.jpg)