I'm not quite seeing how a steering shock avoids bump steer.
if you were having significant bump steer, I don't think that the steering dampener would eliminate it. I can see how it would dampen the response some what.
My 67' F250 had cross steer, and I know that some people have converted their fridge's, but I just can't find the info. I would be tempted to just go to the junk yard and get a bunch of parts that might give me what I need, but around here, the local yards think they are gold dealers! I will wait to find some better examples of what I'm looking for.