I don’t think I have ever seen a “history” of poor welds on any Chrysler product – except on rare occasion.
I do know that people have bad days (hungover, divorce, broken leg, etc.) so things do slip by – but generally quality control catches most “issues” beforehand.
Welding the seams on K-frame, and metal (aluminum or iron) K-frame mounts would be a must, as well as frame connectors. The cage will help with frame twisting.
I’ve seen a lot of banged up suspensions on the Tulsa Police Dept. and Sheriff’s Dept. has put on these cars (F & M’s) and I have no concerns whatsoever on the suspension handling it (front or rear) – except for possibly traction control.
At least the tires today are better than what they had 40 years ago.
BudW