Help! Accidentally removed power steering pressure valve

I pulled a valve out of a 73+ junk Duster ps pump at a local scap yard - had 3 shims in the pressure relief valve. Took the one out of the 72 I was working on which had no shims. Put one shim in and reinstalled, steering still felt a little sloppy. Repeat procedure to install a second shim and the steering feel tigthened up, but then the slop in the steering box was much more noticeable. Bought a manual box, now the power setup is on my garage floor. I never ran into the floating / self steering issue some guys talk about on here.