For 35's the general consensus is a 2.5-3" lift (which is about max due to the torsion bar front end), after market upper control arms, pinch weld flattening and some do a 1" body lift as well.
If you're wanting 4-6" of lift and 37's then the 100 is the wrong platform for you, IMO. It's basically not possible without very deep pockets and lots of custom fab work. The 100 is much better suited to 0-3" of lift and 33"-35" tires.