I guess there is more rust in the 57 fenders than I remember.
http://s228.photobucket.com/user/TURBOFIRE400/media/70 CHEVELLE/P6090332.jpg.html?sort=3&o=0
http://s228.photobucket.com/user/TURBOFIRE400/media/70 CHEVELLE/P6090332.jpg.html?sort=3&o=0