Not sure if you ever found resolve to your inquiry. With your factory tires being 225/60/16/ you need to go down two aspect ratio sizes if your going on step larger and one step wider. For this you would want 235/50/17's. As far as the rims your lug pattern is 5x115 not the 5x120 you have posted. If you size them up for a Charger/300/Challenger you will be ok. The only issue with those is they tend to be in larger rim sizes. Worst case a Mustang (5x114.3 lug pattern) will work too. Just note 94-04 Mustang wheels will stick out a little from the fenders whereas 05 & newer will fit flush like stock.
