So I tightened up the center bracket, and it came loose again. When I tightened it up the second time, I broke on of the U-bolts. So after tightening the one that was left, I had someone weld the other side to the axle.
Here's where someone can learn from my mistake:
I didn't have the bracket centered, and now I have really screwed up my turning radius.
I'm going to hope I can find something like a piece of unistrut, cut it down to 6-8 inches, and I see if I can put it in the center between where the two shocks meet, thus (I think) increasing my steering radius.