In 1982, I owned a '70 Challenger 340 4-speed car. A/C, 14" steel wheels w/full wheelcovers, AM, and the beauty of it - Bronze metallic paint, black vinyl top, and bronze interior. The PO, a friend I went through aircrew training with, decided it was a good idea to put a bullet through his head one evening. About three months later, I found out his estate had the car for sale, and I got it for $450. It was a very fun car, but it had more rattles in it than a toddler's playpen. It drove very well, despite all that. I've owned five other E-bodies (all 'Cudas) through the '80s and early '90s. They were really no better than the '70 Challenger, and age didn't help them at all. The only E-bodies that don't rattle are the rotissorie-restorations, where the quality control and care in assembly is far greater than any E-body that came off the line.
Another example is a 340 Challenger my brother-in-law was working on at a dealer in Lakewood, Colorado back in 1971. The engine blew up with just 8K miles on it. Warranty 340 went back in, and the customer was happy. What caused the damage was foreign object debris, or FOD. Someone at the engine assembly plant apparently thought it would be great fun to leave a tool in the pan, so the story went.