Garry,
Do you know anyone from the organising club for the All American Day at Castle Hill......?
They really need to get some serious feedback in the form of "its too damn hot in January" to have a car run on a rooftop parking lot.....
This is a good run, but it should be held in March maybe at this location.....if they want a January date near to Australia day, they should consider a big grass park with shade trees somewhere........