Greg,
With AMT reissues, it appears to be hit or miss with the custom (Stylized) clips. The '57 Chevy from 2000s has them, while the '57 Fairlane does not. The '50 Ford convertible 3n1 has some nose options, and the aforementioned '53 F100 does have the Chevy rear fenders and a couple of custom grille treatments. And, of course, the repops that put the stylized stuff front and center on the box art ('63 Galaxie, '61 Fairlane) contain the wild clips too. The AMT '64 Marauder has front and rear clips that mimic the Adonis '60 Ford. The '65 Grand Prix has some wild (ugly, IMO) front and rear treatments too.
I guess the moral of the story is: With AMT vintage repops in the 1990s & 2000s, you never know what you got 'til you bought it and opened the box!