The chassis aren't all the same...well, not techincally.

The chassis for the car of tomorrow have tolerances they have to be in, and they all have to be approved by NASCAR itself, then the body of the car is mounted. It's a pretty long process from what the teams have told me.

Jeff Gordon in particular has been vocal about trying to get NASCAR to change how it approves the chassis since the cars go through so many templates during inspection at the track. And if the car gets wrecked, you'd basically have to start all over....

And just for everyone else... if you haven't ever been to a race and you get the opportunity, please go. It's an awesome experience...and one lap inside during a race will change anyone's opinion on the sport, I promise.