ok so heres the deal. i need new tires to pass inspection and i want to put 285/75r16s on my 98. i know they wont fit at the stock height and i have 3" blocks for the back already so i want to just use some torsion keys for the front but i dont want to mess up the shocks when i go off road (not too often) and i dont want to screw up the CV joints or the overall ride of the truck..2.5-3" keys wont do that will they?