Is anyone running a 4.56 gearing? I have an 08' FX4 and I'm getting a 6'' BDS lift, and a Whipple Supercharger. I already have the over sized tires on my truck but I wanted to know how the 4.56 gearing is working out. I know with 35" tires 4.56 is close to returning it to stock as far as RPMs and whatnot. Do you like the 4.56 or would you recommend something else. Also does anyone have the installation instructions for a Whipple install on a 5.4L? Thanks guys