I was having trouble just getting the bottom on by itself. I'm putting SPC upper and lower arms with the Howe tall upper and lower balljoints on. I guess they don't fit quite so well with drums. Tomorrow, I'm going to have to pull off the backing plate and grind a little bit off. Right now, the plate rubs on the lower ball joint from about 70% full lock. I don't think there would be a problem with discs. I got the one side on, but it was a royal pain. I think with factory ball joints, it might have been ok. I'm looking forward to see the ride height when it's finished. I used one 1/4" spacer in the LCA. I hope that's enough. It looks like a regular pickle fork won't get these BJs loose.