I plan to drive the crap out of my 40 when I get her done. 99% street, 1% trail. I have overhauled the 2F and picked up a H55 and split case. Want to go with 33x10.5's on stockers with 4" lift. My question is - will my road worthyness improve with 3.70's instead of the 4.10's?? What is the best (most efficient) cruise RPM for a 2F? What do ya think?? Just want to get the best MPG that I can.