The OEM ones will give you .75" max. Your WK is lifted, get the longer ones. As you said, people report different numbers. If you get the longer ones and you have too much rake for your taste, add a strut spacer.
2006 Black WK, Modified OME HD ~3.5'', Bilstein 5100's, 1.5" Wheel Spacers, Black JK Moabs, 285/70/R17 Duratracs, 7W Reverse LED's, tow hooks, 2 Hella 500ff's behind grill, Expanded sheet metal grill, ORT badge, Tail light guards, Firestik 3', Aux. input, Black housing headlights, Stingray roof basket, 2 Hella 500ffs on roof rack, 18% tint.