Stop in for a cup of coffee

so maybe one of you fellers know this:

is there a difference between a steering gear box from a small block car vs. one from a BB car or for that matter a slant six car???

I have one I pulled from a 72 fury that had a 5.9 and I was thinking to use it in a BB car. I have never had power steering in an A-body or much of anything else for that matter.