I think the collage idea is fine and a great way to include a lot of detail shots. Some of the body shots could be a bit brighter and I would like to see more full-car shots. A bit of fill flash would help those shady areas pop a bit more perhaps?
Personally I like the 3/4 low angle shot (that is almost impossible to get when other cars are nearby) to bring out the aggressive stance.
http://www.texasphotoforum.com/galle...00&ppuser=4447
Nonetheless, a lower angle is almost always a good weapon in car shots.
If this is your 1st you are way ahead of most of us already!