As dmsfrr says, they were FoMoCo parts. I think the pump was supplied by Eaton. At some point (many years ago) I remember those being referred to as “power on demand” steering. You were driving car manually, and only when you turned the wheel enough to overcome the valve was hydraulic pressure routed to the ram to assist the steering. That contributed to the dead on center feeling those had. But they were around for a long time. I think the Vette’s used them thru 82, long after GM was using power boxes on everything else.
The main complaints about the ram system is not having a little hydraulic leak off the ram. Part of that is no good parts supply for rebuild.
If I’m right, the Borgenson box referred to above is a powered box, that’s where the hydraulic hoses hook up. No ram.