Titan sway up front with aftermarket upper control arms, and ext coil over with new axle shafts should be good for around 3.5 maybe four inches. Pushing the spindle out and extending the axle will allow you to run a little bit bigger lift. THe thing is you need to try and keep you cv axles as straight as possible. Then for the rear like everyone else is saying go with a new leaf pack. You can get the 10-leaf from prg and get 3 inches and be good, then with the titan swap and coilovers get around 3+ to level it if youd like.