If it's an E-body rear, it's from a 70 model car. The parking brake cables both run to the drivers side on 70's. It's possible that it's a C-body rear. The only difference I have been able to find between the C and E housings is the placement of the brass T for the brake lines. I'll have to look under my Challenger,and then at a C barge rear out back to be sure. Right now it's dark,it's raining, and I'm lazy!
If it's an E-body rear, it's from a 70 model car. The parking brake cables both run to the drivers side on 70's. It's possible that it's a C-body rear. The only difference I have been able to find between the C and E housings is the placement of the brass T for the brake lines. I'll have to look under my Challenger,and then at a C barge rear out back to be sure. Right now it's dark,it's raining, and I'm lazy! 
