+1 on the 3.55s by the way, unless you've got some oomph behind your motor. There is a noticable difference in the 4.10s and 3.73s. Its generally accepted that 3.73s are the tallest oyu can go while still maintaining any hitn of highwya drivability. 4.10s are not for anything you want to cruise in. You'll kill that engine in no time with the RPMs you'll have to spin to do 70MPH.