235/75R17 is a 31” tire. That may rub a bit at full lock/articulation with just a 2.5” lift. You may need to pound over the pinch welds and trim some plastic in the front wheel wells. The wheel spacers will most likely accentuate the rubbing because the wheels will steer in a wider arc. One other wrinkle depends on the type of lift you plan to install. If it’s OME or JBA then it will improve your ride and last a long time. If it’s a spacer lift you can expect it to sag your stock springs within a year, meaning even more rubbing.
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2008 Liberty Sport 4x4 Automatic
Jeepin By Al 4" Lift Kit
BFG KO2’s 245/75R16
Full MOPAR skid plates
Rock Lizard Skink Super Sliders
AtTheHelm Front Recovery System & Roof RackM116A3 Trailer build thread: viewtopic.php?f=72&t=77997