Oh, yeah.... that too!!!
I saw a good photo the other day of a license plate frame mounted upside down. It read "If you can read this, please turn me over..."
Another thing to seriously consider is the mounting of the seats, and the use of proper harnesses. There have been some serious accidents involving Cobras lately that have highlighted the danger of driving these vehicles with safety equipment either missing completely, or incorrectly mounted. Also consider the traditional fuel caps that will empty the contents of your fuel tank in seconds if your car rolls over. The properly sealed, lockable caps can go a long way to preventing this.
Anyway, the rollbar still has to look good
Craig