I think I just eyeballed mine. I mostly worried about clearing my FJ60 power steering mount. I'm not sure threading the holes in the frame gves you enough purchase to hold the bolts in. I put nuts on mine, which was not too bad. I actually used duct tape and a closed end wrench and pushed the bolts through from inside the frame, through the shock tower and I put the nuts on the outside. I cut the fenders with a cutting wheel which seems kid of crude, but it turned out pretty well. I'm away from home and probably won't have a chance to post a pic until after the 20th.