Scary, steering arm goes on the lower holes.
The pump pressure is checked with a power steering pump pressure gauge setup. If the pump was working with the previous setup, it maybe the pressure regulator/ relief valve is for a lower pressure than your box requires? A higher pressure valve may be needed. It may also be a problem with the steering box . Just thinking out loud here.The power steering pump is the original pump that came with the car for the power assist steering. The pump was rebuilt and reused. I assume it is working but I don't know how to check for flow or pressure?