I have an open right now. What kinda of 1/4 mile drop would a detroit locker do? I have 4.11's in it with a T-5 tranny. I am pushing 300HP. What would lower my times more, putting $450 in the Locker, or go to all MSD, cam swap (i have a .488lift cam now and would go to a .512 .512 lift), ram-air? Most improvement for the money?