I spoke with my contact at Reese and he said they have not had any reported issues that the rivet nuts included with the Dual Cam sway control were too small. Just to be sure, you can check the knurls of the nut with a dial caliper to make sure they are slightly larger than 11/16 of an inch, or 0.6875 inches if you use a digital caliper.
Your solution is the exact same solution that Reese recommends in this situation. Drill completely through the frame and run bolts to the opposite side.... view full answer...