Thanks to all for the replys. It looks like my best option is to just stick with the 3.91s for now and see where I stand the first couple of times out. Priority one is to not break anything. I was just looking at it as a way to tune for max HP without holding the engine back and staying legal. It may have potential for low 11s, but with my pure stock street chassis and no tuning, I might find myself a long way from that territory.