2"

 

If you really want to lift the front end, without doing the suspension lift, and without cranking tbars, get actual aftermarket torsion bars. Sway-away makes t-bars for our trucks that run $450. It in effect is like putting in a taller, stiffer spring. It will give you the lift like a tbar crank, but you wont have sag or spring rate deterioration over time like you will with a simple crank.

Best bet would be the lift with the new control arms and then get new t-bars...but then again for that price you could probably just get the 5-6' suspension lifts..

 

regardless of how you lift it, with the exception of the big 5"/6"++ kits, the diff stays stationary and the wheels move further away from the diff. a steeper CV shaft angle is what makes up the difference. the steep angle is what will kill your front end in the long run.