[jeff88]

How crazy are you willing to go? Do you care about looks at all?

I don't think an air dam is going to help you much, since you're already so low to the ground. A grill block on the top would definitely help and blocking as much of the bottom as possible while still having cooling would be good.

The rear hatch looks like it has a sharper angle than the template. Have you tried using the template yet? If you're going for looks a kammback to bring you back to template would be nice. If you don't care about looks, then a boat tail would help.

What does the undercarriage look like? With how low to the ground you are, a full belly pan might be the best way to go assuming you have a lot of parachutes hanging around underneath the car.

Try finding some wheels that are more "covered" or use some coroplast or other material to cover the ones you have. Wheel spats would also be useful.

You might consider running a sheet of coroplast from the hood bent up to the windshield to give the air a better approach angle. You could also hide your wipers underneath it. This would be a finishing touch though, the other stuff is lower hanging fruit.

Good luck!