I put on a brand new pump, hoses and a reman'd box and had ok steering, but not what I thought I would have after the upgrade. I even had a local garage bleed the entire system to make sure I didn't screw that up. After about a month, the box blew out a seal and I exchanged it for a new box. It was night and day difference. I can 1 finger the steering wheel at idle on pavement while parked with 31s.
Long story longer, try a new box.
Long story longer, try a new box.