Rear end alignment issue 1969 cuda

Has the car been converted to disc brakes? The discs on the front will give the illusion of dog tracking due to the wider track on the front. There was a TSB on here that someone posted. The tire being closer to the wheel opening isn’t that uncommon either. There’s variances between the tolerances on these cars. Not saying you are or aren’t dog tracking just trying to throw info out there to help.

TSB mentioned here.
Disc brake conversion question