If you look you'll see a re-enforced section that the seat bolts and seatbelt bolts go through, this is where the brace is attached.
Ok, I screwed up the LCA mounts on the crossmember. When I took my measurements and checked for clearance, I was placing the mounts under the crossmember, as I was actually building the LCA mounts, I figured it'd be cool to tuck them up in so I did. Problem was, I never check for clearance problems first. When I install the LCAs, I had about 3-4" of up travel before the arms contacted the frame . So, I had to pull the crossmember, cut/grind off the old mounts, and make new ones and weld them on. I did find that my welds were plenty strong, it was a real PITA getting the old mounts off. Now everything is back together and no clearance problems.
Live and learn.....