Well I just learned something new, I thought only higher rpms and exhaust brakes required 60lb valve springs. I guess it makes since that boost does play apart it floating the valves, specially when some guys are running upwards of 60psi. I think I see this mod in my future...

Valve adjustment=60lb valve springs

 

Yeah, once you get high boost it will matter. I dont think a single charger on a street truck will be affected much at all. (from what ive heard, not from experience by the way)

Get the valve springs, i slept so much better last night after i got them in!