I have been wanting to do this for a while, just to lazy. I am going to move the front axle forward a few inches, put flat L steel rock rails, chop off the rear lower corner and have the wheel well resealed. It should look good when it is done. I now have much more room for FLEX.
A friend of mine that owns a body shop will take care of the wells, I assume welding sheet metal in there. The bottom rear corner will come off at an angle, not to the firewall, I don't think, but it may com e into the cab a little.