Early Barracuda body cracks under rear window

JDMopar said

If the welds are made more solid, I don't see why that wouldn't work.

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Idk about the first gen so much but the seams on my 67 are HUGE. I would not feel comfortable filling all of that with plastic filler. There would be corners built. I can get some pics of my 67 tomorrow. It ain't pretty.