1970 Duster power steering issue

Exactly.

Overboosted power steering and swapping lanes unexpectedly are completely different problems. Probably time for a front suspension rebuild and an alignment.
I have not driven it yet. Been waiting to get insurance on it before I attempt to start it. Lots of stereo wires everywhere to remove. I do have the original box but he said when he did the swap it steered to easy and needed a pulley change. Bought from the original owner, in his 80’s.