SS/B and SS/A Chassis and Suspension

Minor movement inboard of shock and spring mounts is allowed.

As I see it 1972 may have been the year when leaf spring were moved in under frame rail ...

I don't know the answer, but if you're wanting accurate info, i would suggest a little more research. "Minor" could be interpreted relocating into the frame rails, but that does involve "surgery". It might mean something like the 3/4" offset leaf spring brackets that Mopar sold.