Brian, are those pictures from an event or did you just happen to see them go by? They look good, especially the maroon Vette. I think they are a little too blurry, maybe just lower the exposure a little. I was experimenting with those kinds of shots when I first got my camera. I think I went up to 1/10th of a second, which was way too long.
A couple still turned out decently, but I can only find one.
purple/yellow C5 Pace car. I was just thinking yesterday that I haven't seen one of these in a long time.
old red Challenger
new black Shelby GT500
red C6
old Ford hot rod
and these: