When I was young 14-16 I used to helped an old guy in the neighborhood who restored 55/58 T-Birds. When we where taking them apart, I would comment on how poorly the manufacturing was of them. He had worked on the assembly line, and said they pushed you so hard for production numbers that if a part was defective, bent, out-of-alingnment you just put it ion and didn't worry about it. But for him restoring them they had to be perfect. He did some beautiful work.