Brandon - On the roll cage I built the roll cage for Team Trouble Racing, and a sport cage for my Tracker. We have been using a tubing bender which makes rolled bends. That is the easy part, getting a good job welding & bracing is much harder. Preparing each weld area is very important for good penetration and better welds (good welds also look good). A vehicle rolled at 60+ will be testing the strength & iintegrity of the roll cage a lot more than most rock crawler are. If you are not familiar with welding in all positions, your roll cage for a race car is not where you want to practice. These things can roll anytime (even out behind the house), find a local shop to work with on the cage. On Project Trouble I listed where I made the bends for that roll cage, and will give you an idea of what is involved.
I hope you can find the time to run over to the VORRA 500, extra help and support is appreciated when racing.