Both Chargers that didn't stop straight had disc brakes on the front.
Really? Gee, I thought the cure for front drums was rear discs
I would hope you would be smart enough not to put rear discs on a front drum car, but I am beginning to wonder.
Bit of advice, find yourself in a hole quit digging.
I stated that I saw with my own eyes,and personally experienced that two Chargers with disc brakes in front and drum brakes in the rear did not brake straight,and did not stop in a short enough distance. In the case of my own car,the rear brakes appeared to lock up about the same time,and left approximately the same amount of rubber on the road. The question by the OP was are rear disc brakes a good upgrade and are they worth it. I was stating that the Chargers were not four wheel drum brake equipped cars,I'm sorry if I really have to break that down for you!