hey, i failed emissions with my crower 404 cams in my ls so i put my stockers in and in the helms it says to adjust the valves from .008-.012mm, what should i set em at? could they be too tight if i set em at .008mm? whats a good setting? and i have the dual valvesprings and retainers, would that make a diffrance with my stock cams regarding my valve clearance? thanks