1965 dart gt spring question

6 leaf springs raise the back of the car about 2". It also looks like the front has been lowered, and you have a tire stagger with the 205/75s in the back as compared to the 185/70s up front. The first step would be is to fix the shackles and then see where everything sits.
Nope. The factory had 6 leaf springs for the heavy duty suspension option. It didn't add 2" to the height. The issue with the OP's car is the shackles are inverted like I mentioned above and you agreed with as well. That will jack the rear end up (like it is) and the way they are is not the way they were designed.