I read a thread about this on another forum. I have no idea which one. The fronts are a relatively easy and will bolt right up. The inner part of the rear spring is smaller than the tj. You must heat and bend the upper most portion of the coil. The review was very favorable about performance improvement. If you use jkur springs they give a tj about 2.5" of lift.
My disclaimer. This is my recollection of a thread I read a while ago. I make no specific claims of accuracy or fact.
Yeah, the bend was really minor on the finger that sticks in. The opening is just too small.