Originally Posted by sixtysevenGTconv
I know for 67 & think 68 be the same, wheel well lip molding was part of the "exterior decor" option. Someone else can add to what I missed.
The "Exterior Decor Group" was dropped between the 67/68 model years. I believe the wheel opening moldings were part of the new for 1968 "Sports Trim Group", but no doubt they were often offered as a "stand alone add-on" by dealers for additional profit mark-up and customers could also buy them over the counter from Ford Dealer Parts Departments. They must have been popular because based on pics a great many cars had (or grew) them.