If you have electric stab. jacks you need to buy the Lippert "adapter kit" like in this photo. It drops the mounting points of the Strongarms so they don't crash into the jacks when retracted.
I installed the equivalent, BAL lockarms. I couldn't find a spot to mount the upper end so mounted them to the underside of the bumper. Works better anyway because you get some side-side reduction and some fore-aft as well. While in there, I also mounted some 8"x8"x3/4" HDPE to the jack pads - no need for lego blocks or pieces of wood.
BAL said nothing about needing the Lippert adapter kit. Maybe the others out there don't either? Took some head-scratching and internet searching to figure out I needed them.

