I have 3" taller shackles with a spring over axle lift it gave it roughly 7" of lift plus the lift I have from the 31" tires I run. I did have to add brake line extensions and a drop pitman arm it rides nice but if I had it to do over again I would not do both the shackles with the SPOA (only because the shackles I bought were homemade and they have eaten up the bushings). I also would not do the drop pitman again I would go with a Z-Link or something else like cross over steering. Good Luck with it.