Be very careful where you mount it. If the shoulder straps are mounted at the wrong angle you can break your back in a wreck. I suck at explaing things but I think you are supossed to mount it as straight back from the top of the seat as possible. And no more than a 45 degree angle poointing down. Check the NHRA and see what the specs are.
I'll keep my bible, I'll keep my guns, I'll keep my ammo and you can keep the "Change".