[James the III]

I'd pick a few crossmembers that are never being removed.. and plug weld where the rivets were.. once you have the frame square..

As for the member that bought cheap amazon bolts.. I'd rethink this.. no really..
If it's a world of wheels roll it out of a trailer and show than roll it back in. then ok.. but if it going on the road.. rethink this.
Graded stainless is not cheap..