Some of what I have read here sounds like theory instead of experience. Lowering the car WILL affect caster.Anyone with experience with front end tech knows that. The toe setting will not change. The suspension was designed in an effort to minimize toe changes during full travel of the suspension. The camber going a little negative wont increase tire wear nearly as fast as incorrect toe settings. On a longer wheelbase car like the Charger, the alignment changes will be less dramatic than on a 108" Cuda or Duster.
A true, old timer alignment guy should be the one that can answer this question with certainty, but the guys that knew these cars when they were new are probably all out of the business by now. Good Luck.