Looking for a remanufacture 1963 Valiant manual steering box

I don't have the experience to distinguish between a good and bad used steering box off of the car. My fear is that I buy a used one and it's no better then the one I have. I take a risk of installing a used one and still have a lot of play in the steering wheel and wasted my time changing the part. Not sure where to find a good used one at. Thanks for your input!