The Calmini kit has a sway bar bracket that causes the sway bar bolts to be parallel with the ground, as where factory the bolts are perpendicular to the ground. This bracket prevents the Shrock Radiator skid from sliding behind the sway bar bolts to be mounted. I don't have pics, but I could take some tomorrow if needed. I've PMed a couple guys that have both the Calmini kit and the Shrock bumper and skid and haven't heard anything back yet.
I think some guys are just removing the sway bar completely. My coilovers and UCAs are supposed to go on tomorrow and I'm trying to get this skid plate figured out before then while I have access to am impact gun.