The front is set geometry, even with lift you use stock shocks. They will just ride in on a different section of shock.
As for the rear here's the deal, when you lift 2" you don't just add 2" to your shocks. The reason for this is that the axle movement is not equal to the shock movement this is because the shocks are mounted at an angle instead of vertically. So depending on the exact shock you get you may run into the issue of having too long of a shock body and having the shock body become the limiting point of the suspension compression instead of the bump stops (this is bad and results in broken shocks). Now yeah i know "someone on the internet" just like me can tell you 2" will work just fine, and it could but there are also variables to consider. Wheeling style, sway bars, street time vs trail use all of these things are game changers you could go years on this setup or one trip.
A side note: When an aftermarket company has a shock for 2" of lift does not necessarily mean that the shock is 2" longer, as long as it is specific to your application.
The best thing to do is measure your full compressed and full extend lengths with your new springs. Order your shocks accordingly, keep in mind that you want a little more shock than amount of travel so that you use the bump stop to do it's job. Otherwise you may find yourself spacing your bump stop which isn't really a big deal. Tuning.