You can check everything about the steering box on a bench if you know how to check a steering box.
Parts sellers may not know how to check a steering box.
CPP is not under the same management as they were years ago. They do not make steering boxes. They buy them from someone else and ship them to us.
Once you install the new box which you have bench tested, all you will need to do is make sure that the overcenter resistance occurs when the wheels are in the straight forward position. If it does not, you need to lengthen or shorten the adjustable drag link supplied by CPP.
