HELP! Steering Column Question

[adamd320i]

I am working to get my '71 C-10 road worthy again after nearly 5 years. I ordered a lower steering column bearing and retainer from LMC truck last week and it arrived today. The lower bearing that is currently in the column has slowly been reduced to nothing more than the inner bearing ring, so there is a ton of up-down, side to side slop in the steering wheel. I'm fairly new to the sight so this may have been covered before but I have search the threads and cant find any info on replacing the lower bearing. Any help would be greatly appreciated!