Amazing cars, all of them.
They had a Historic Grand Prix F1 race (mainly 70's-80's F1 cars)before the main race and it was a blast! The Black 1978 'Lotus 79' John Player Special car had the most intoxicating noise I've ever heard! <img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" />
Quick vid:
http://www.youtube.com/watch?v=XPoKNteluHc
Sched:
http://www.historicgrandprix.com/schedule.htm
Champ cars had way too many yellows, but I had a lot of fun. Some exciting action as well (hense too many yellows!)
I highly recommend checking out the HGP if you can, and the Champ cars as well.