What do you mean by" it did not work"? did not bolt right up, did not produce flow when filled with oil and engine running, what?
There is not any reason why a saginaw pump would not work with a Toyota steering gear. I have installed a few of these set ups from Classic Cruisers, and they work fine.
If you know what the pump came off of, I would go and get another one from a parts store, or go raid the u-pull, and get one that is similar, and put it in there. It is not too hard to swap a pump from a reservoir, in the event that you go new, or need to because of the spot of the return port. Pay attention to the fitting on the backside of the pump that the pressure line attaches to. The later model pumps have the o-ring style, instead of the 45degree flair fitting.
Good luck!
-Steve