Are there problem areas on the 67-68 Barracudas

I have always NOT lived in the rust belt. I have built many, many dozens of Mopars, I never had one with a bad or rusted frame or rocker! Yep I have seen some rusted one in Kansas City but never bought those! But I never lived in the rust belt. But I have had a few cars out of S.D. and Mn., but those cars were special and never drivn in winter!!
When I haul a project home with typical rust, I HAVE to cut it out and weld in good metal> I can't sleep till I do. The it needs some epoxy primer, then it needs some filler, then it needs some epoxy primer again, and high fill urethane or polyester primer, Then it needs a sealer, then it needs finished!!!!! Can't stop the process! Wish I could. Wait I forget about just a little sanding!!!! ha
At my age, it may not be perfectly strait, but, by God, it ain't rusty!