I'm using a 1979 F250 4x4 power steering gear box on my build. I need to know what the usual pressure the stock power steering pump runs at and GPM? Got to make sure my industrial hydraulic pump I'm using isn't to much for the steering box. If it is I'll need to get a pressure reducer for the system.

 

Around 1200 psi at a minimum.(for a pump in good working order)

 

What's the max PSI that can be pushed through the box? So I'm assuming stock is around 1,200-1,400 PSI when these originally left the factory?