Ok just swapped out my stock 1.5" studs for apr 2.5" studs and well they dont go as far as i wanted but also dont look retarted with my stock rims on like the 3.5s would have. Anyway just wanted to make sure I am reading the rule correctly
Nhra states
Wheel studs must be threaded into hex portion of lug nut a distance at least equal to the diameter of the stud

So that means it would have to go halfway in to the head section of the shank lug or go past the red line (lets say that is the halfway mark of the head section cause tech itwould be open end not closed like the pic)