I was wonder I have wanted to lift my blazer and have found lift shackles that are 2 inch lift for the rear and was wondering if it would be a 2 inch lift for the zr2 model because I know that the 3.5 inch lift from roughcountry is only an 1.5 inch lift for the zr2

 

Because zr2s are already made a little higher, they only get the approximately of 1.5 lift.

I found after market lift shackles that has holes for 2" and 3". Maybe thos will give the 2" lift you wanted... I still have mine new never installed as I picked up a rc lift kit that cam with the shackles.

 

With lifting the rear with 3inch shackles would I have to get longer sway at end links to and I would probably have to get longer shocks too

 

Yes, there is shock extenders if you have good shocks and dont want to replace them. But that will also raise your rear higher then the front.