I'm never on a road with a speed limit higher than 55 and never drive over 60-65. I did not change the valve springs yet but I have Comp 901-16's new in the box. I normally drive it 1500-2500 miles a year in nice weather and don't have any intentions of any long trips. Obviously, the hotter than stock cam doesn't make much sense if I leave the 2.76s. While answering you guys questions, the 3.55's seem to be becoming more of a no-brainer.