I'd suggest just driving it for a bit before ordering anything to see how it shakes out. I don't think you are going to have any issues, based on my experience.
I don't suspect any issues either but you never know. This isn't the correct way to lower a truck. The correct way involves going to the dealership and getting a 2WD in the first place. I mean who in their right mind would want to lower a 4WD truck.
I don't mean to knock anything Matt said as his concerns are valid, I'm just saying I haven't had any problems with mine done the same way.
On a related note though, I do have Bilsteins up front and the travel on them may be a bit different than your stockers, just something to keep in mind.