Is there another bearing in the actual steering column itself? I just replaced the intermediate shaft that hooks up to the gear box and now the whole assembly wiggles all the way up to the steering wheel...I already did the the bushing that's in the engine bay. I'm trying get the steering tight on this thing and the hole just keeps going deeper. My old intermediate shaft only had about 1/16 of play at the bottom u-joint so now the culprit points to the column itself. 

How about this?

http://www.rocksolidramtrucksteering.com/

I did that already, it's tight there. Further up the column in the firewall is where the movement is.

 

Beyond that I don't have a answer... I don't know of any replacement bearings... Might be one in the top but unknown if you can get it out or replaced.