Offset bushings is a band-aid to cover a real problem in your case. They are ment to be used to increase castor for high speed stability. There is no way someone can spend 5 hrs on a simple alignment and not know what is wrong. The 60s-70s Mopars take about 30 minutes to align including set up time and it couldn't take more than 15 minutes to find a problem.

You have one of 4 problems asuming you have the correct parts on it;
frame rail/rails bent
spindle bent
lower control arm bushing beat out
k-frame shifted to the right (which would probably have enlarged mouunting holes and a frame rail issue.

Once again you will have to find someone who knows what they are doing. I wish you the best of luck, I'm surrounded by idiots at my shop now, we can't find any good techs.