This front diff-drop designed by "missile scientist" (yes, that's true) Doron Strassman allowed Doron and myself to further lift the IFS front-end enough to fit 35-inch tires (315x75-16). We were the first to do this to our 100's in the US (that we know of). This modification took about 2 hours and required new bolts, some spacers (we used washers), and the cut and re-welding of a front crossmember. Doron's design was quickly copied and you can now buy this modification in a "bolt-on kit form" from Slee Off-Road. The diff was lowered 0.95 of an inch, enough to bring the CV's to a good angle despite the 2.75" overall lift. Cost? $20