I have installed tow of these lifts thus far and both of them netted well over the advertised 3.5 " of lift! 33" tires will easily clear no problem!
I put one on BostonJeeps YJ and we parked his with the lift (also had boomerang shackles) and stock 29" tires next to my 5" lifted (slightly sagged springs) and 33's and our fenders were level!
With 32's he is slighlty higher than I am, for now!