With any lift I'd sugest subframe spacers that match up to your lift ro re-center the rear wheels under the wheel well/arch. 2" is the most people would go without adverse effects tot heir car. Anything over that then you start endangering your car due to the CV angles from the lift.
I also always suggest to people spring lift > than spacer lift performance wise. The stiffer suspension from the lift springs effect the car similarly to how it would if you were to drop it. Obviously there is still body roll but not as bady as one would think IMO. The body roll on a straight 2" spacer lift would be horribly on stock springs. If you wanted to do a 2" lift I'd suggest a spring lift along with a 1 inch spacer lift with subframe spacers.
Anderson Design Fabrication (ADF) does customer work as well. He can factor in a spring lift with a spacer lift and design you subframe spacers accordingly.