Its been a very long time but I think your hoist may be a Perfection brand. At least that is what comes to mind from looking at the pump. Thirty years worth of a fading memory since I had my mits on one but I know its a cast iron gear pump, cable control (or lever, both would work)and about 12 gpm @1000 rpm. At one time I was a Perfection dealer.
You didn't ask but this is just FWIW. Nice old truck and a fun project.
