Been awhile since I was last here, so I thought I'd post all my work that I've done since. I'll start with oldest first. Forgive me if I've posted any of these.. It's been so long that I really don't remember.
Saturn sports car
Chevy SSX (in other words, a sporty El Camino)
Chevy Monte Carlo
Chevy Impala (same design theme as the MC)
Pontiac sports car
Buick sports coupe
Buick sedan (similar design to the coupe)
I think that's it... Enjoy.