thrust play on steering shaft

[AirSpeed]

I installed a new steering wheel on my 72 GMC today and when I was done I noticed about 1/4" of play in the steering shaft. I actually notice it a while back but it wasn't an issue with the stock steering wheel. I can pull the wheel out about .25". The chrome piece that covers the adapter rubs against the steering column slightly when I turn the wheel. I can easily space the cover so it wont rub but I would like to get rid of the play instead. Is there a thrust adjustment in the steering shaft that goes through the column?
I also replaced the front brake calipers today and noticed a little play in the lower ball joint, my truck is a four wheel drive. The play is very slight, I can just wiggle it. I attempted to tighten the nut but couldnt get a wrench on it. I wanted to see if tightening it would get rid of the play. What is involved in tightening it or if necessary, replacing it? Do I have to remove the axle to get a wrench on the nut of the lower ball joint?
Thanks!