If you were going to make any weight restrictions at all, I would say 6k is I nice round number. My old truck ran in the mid 10's consistently on the stock bottom end. I do think that some type of index is necisarry. At least it gives the guy with a slower truck a fighting chance. The truck in the opposite lane might be much faster, but he has really got to be on his game so he doesn't break out. Call it what you want. No matter what I enjoy racing! I don't care if it's a foot race, or an all out drag race for thousands of dollars:Cheer: