Power Steering Noise

Finally got new Gates belt installed and guess what?? Same screech over 2200 RPM. I have been trying to remedy this for a few months now and could use some ideas here. Just to recap what I have done. Have been running this set-up for 10 years with no issues. If I remove PS/Fan/Crank belt, I do not get noise. Replaced belt with another used one I had. Flipped sides with it as well. Tried different belt tensions. Noticed pulleys not aligned so shimmed to align. Tried soap trick. Tried water trick. Replaced Saginaw PS pump. While off I wire wheeled pulley groove. Replaced belt with brand new Gates. What am I missing????
The water pump seems good. No leaks or play. Crank is secured properly. I do have some lateral play in PS pump shaft but Rebuilt pump was worse so I swapped the original back in. Replacement rebuilt had fitment issues because it was a square body Saginaw. Hard to tell but may be some flexing in brackets and movement with revs. Any thoughts?