I know others have run that tire size with just a 3" body lift with alittle trimming.
If your taking about a 3" torsion key then that's too high if you have a 4wd, don't do anymore then 2" lift in the front, the IFS setup can't handle it.
I would suggest you buy a 3" Performance Accessories bodylift, the kits will be listed for '01-02 but work for '01-05. There pretty easy to do yourself.