Well, we did it this weekend.
They had a detroit event at flat rock speedway, just south of Detroit. The race ran the full 24 hours, 2 pm to 2 pm. Green flag waved at about 2:18, so it was really about 18 minutes short of 24 hours.
Our car was the "cavabeer". Cavalier covered in beer cans. It was actually quite competitive, until we broke a half shaft at about 3:30 am and didn't have a spare.
The race was quite the spectacle, and a lot of fun. I hope to do it again next year, and next year I plan to drive rather than just crew.
There was a lincoln in the race, a Mark VII. They had a guy from Hot Rod on their team, so it will probably end up in the magazine at some point.
I have a bunch of pictures to upload later, if I get around to it. For now, here's a "before" pic of our entry:
It was almost finished for that pic, we did finish covering the fenders in bere cans before the race.