Extra side belt? Make sure the front and rear belts are in good shape before the main. I have had one break in one main and another end up missing about six teeth when I finished on another main. A little extra ride height. Header spring. Extra wheel nuts. I usually just lock tight mine for a one hour main. Obviously I am running 1/10th. Have fun, I love running those long mains. I guess because I always won or came in a close second. The big thing is to keep the car together.