My god man..6" of free play and your driving that thing....get it off the road and fix it...STOP driving it it's NOT SAFE....FIX it...
If not capable...pay someone..but FIX IT don't drive it....
I see that you havent been around long enough to have driven very many older trucks. There was a time that 6 inches of play in a wheel on a truck would have been considered downright performance handling You can get a LOT of combined slop in the front end of one of these things and they will still be safe, you just have to be a more alert driver Only have to worry when parts are actually failing. They are designed to give an extended rough service life, but that doesnt mean that they will handle like a sports car the whole time.