[keith k]

Agree that NOS sheetmetal can sometimes be very bad. Many of these panels were stamped long after the cars went out of production, when there was no check gage or incoming quality inspector to look at them. Off the press and into the box...

Also, service stampings were frequently produced on a different press (same dies, just different press) than the one that ran the parts for original production.

I have noticed that the "NOS" '67/'68 Firebird fenders seemed to have some fit issues that you don't see on cars wearing their original sheetmetal.