The Chargers have a different opening on the rear wheel well than a Coronet. 4.25 rear spaciing is max before your tire will rub the leaf spring. I have seen as wide as a 10" wide wheel on a Charger with 4" of back space and I thought it looked good. It brought the rear tire out to the wheel well better than a 15x8.
My opinion only.

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So the bartender says to the horse " Gee, Why the long face?"