Any Saginaw Power Steering Pump Experts?

I often wonder where companies like Cardone get new replacement hard parts for their reman's. I have to wonder if belt misalignment wasn't the root cause too. The belt would need to be tight, maybe tighter than would be if properly aligned?
I've never found that excessive wear in the few I have seal kitted. Never heard a knock from any p/s pump before. Good luck with it.