The shakles on the Dodge is raked back and the shakles on the Plymouths are more vertical. I believe the rails are the same. The difference is just under an inch. I have never seen replacement rear rails listed as different parts from Dodge to Plymouth.

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