It's been almost 2 weeks since I started this thread. Since then I decided to tighten them down to see what actually happens. It looked like nothing happened but everything was touching each other so I took them back off. I also figured that any powder coat that cracked up where they met should probably be removed and recoating everything with Fluid Film was in the plans anyway.
After taking them off here's what I saw:
The worst of the two tie-ins was slightly bent a little past where the gusset was. If the other one was bent it wasn't visible.
The 2 holes in the frame, where the worst tie-in was, were bulged out a very minor amount.
There was no visible change in the bumper and crossmember.
Somehow NO powder coat was damaged, so I brushed Fluid Film where everything meets and put it all back together.
Now of course I'm wondering if the stainless bolts and nuts are really strong enough.