Remove the center console.
If you really want to get finicky, you can take out the cigarette lighter. =D
Buts eriously, if you don't need it, get rid of it. Sun visors, the tape deck, back seat. Reaplce driver and passenger seats.
You could have custom parts made for just about any part of the car.
As for the Hood Issue: What do you need a hood for? What can a hood do that syran wrap, duct tape and some legos can't?
I'm sorry, I'm feeling in a giggly mood.
My buddy modified his Stratus with a new steering column that eliminates some bulk, he pretty much gutted the interior, got rid of the A/C and heating, the tape deck. Removed the rear and passenger seats, and I think put in an all aluminum engine and a new tranmission. Obviously an Intrepid isn't a Stratus, but maybe you've actually taken some value from this post!