What was the logic in not offering this?
From what I've "heard/was told" over the years when asking the 2 liter Coke bottle guys about this, the general response was a concern that the grille inserts would not fit properly within the elastromeric bumper because of the tighter clearances due to rubber thickness?...perhaps this is just BS? I don't know?..but sometimes there's no rhyme or reason why the factory had "rules" about certain options being offered/not offered or combined, I'm sure at some time back in the day, a dealer fitted B body rubber bumpers to a Charger because it couldn't be delivered/ordered that way for the customer