I wonder if that Charger was a sunroof car,and thats why the roof was cut off. Check the top of the wheelwells in the rear,and where the door hinges bolt to the body for drain holes. If there are drain holes,than it was a sunroof car.

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