the "Premium" & "Special" cars: GT "LP23/27" & GTS "LS23/27" got a blacked out grill

VS.

the lower priced people movers: Dart "LL41", Swinger "LL23", Swinger 340 "LM23" & Custom "LH23/41" had more "shine" showing

Interestingly "LM" Swinger 340 isn't even listed in the factory parts catalog: sections 7-16-11 Radiator Grille & 08-34-40 Headlamp Bezel, and with the "data book" picturing the GTS nose & tail with Swinger 340 captions - I'm sure it's lead to some of the confusion.