B body rear axle in an A body

This is a 15x8 Rallye with the 8.25 rear and it fit great. I would need to get the Dr Diff kit in it to see what changes in clearance would be.
I don’t have the wheels anymore as I gifted them to my dad.
The 68-70 B-body rear is wider by almost 2” per side. It seems like I would have to jack up the rear and the wheels would stick out.

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