Damn. I missed it. I have so many memories of the Bathurst circuit.
I have even driven up the mountain backwards in a Morris J van

Much to the astonishment of a policeman standing at the hairpin. I was surprised that he didn't stop me.
It was all to do with a fuel feed problem and vaporisation in the fuel line because of an exhaust leak which I was later able to rectify. There was a problem going up hill so I decided to go up hill backwards