With the "Springz Upgrade" and Calmini shackles you will most likely be higher than 3". I'm not sure what the maximum recommended lift for the front is, but it seems a lot of people run the full DOR lift without problems. The main drawback of going over 2.5 - 3" in the front is that the ride comfort suffers exponentially. Also, with over 3" lift you'll probably want to go to a one piece driveshaft.