Dr.Diff sells a special race for the inner bearing,so you can run the one peice later model brake rotors,on your 70/71 disc brake spindles. The later rotors cost about 45 bucks a peice. I always order rotors for a 73/74 Charger.

70 Charger R/T SE 472 Hemi 70 Charger R/T convertible 70 Charger R/T V Code Sixpack 69 Charger R/T SE Sunroofcar 68 Charger 383 68 Charger 318 71 Charger R/T 70 Challenger convertible 71 Challenger convertible 71 Cuda 340 09 Challenger R/T Classic