1970 challenger rt door character lines

Hello,

I am currently restoring my father's 1970 challenger rt. The drivers door is original and the passenger door is not. The lower character lines at the front of the doors are different. The driver door character line at the at the front is almost a inch higher then the passenger door. Is there a difference in character lines between a 1970 and the following years? Any information is greatly appreciated.
Author: Detroit_v71