I wound up bolting in one of the front spring hangers because the rivets were loose (the other side had been bolted in many years ago) using grade 8 bolts tightened till my eyes bugged out.
My plan is to paint the bolts and nuts along with the rest of the frame when I can get it sandblasted. I had a few other rivets that were loose and tightened them up by heating and peening (got a tool that goes in my air hammer). Worked pretty well. I also plan on riveting on the running board brackets that I had to replace.
