GM Remote-Fill Power Steering Pumps

I purchased the PSC saginaw style pump that the tech on the phone recommended. He said it would supply my 125ml oribital valve just fine and would be all I would need. It does a better job than the OEM pump, but barely. the steering is still stiff at lower rpm's. It will turn at low RPM's, but you must press down on the excelerator to have any kind of speed or power.