I did the fix in my 84 K5 just last week. Do a search for "chevy steering column repair" and you`ll find several step by step guides. It wasent hard,just a PITA if you have bad lighting,bad close eyesight and 10 thumbs. Do yourself a favor and first buy a lock plate removal tool and a #8 torx socket E8?? I got both a napa for $19. Every set of directions looked the same,mine looked different as far as bolt access I was able to get at 3,the 4th not even in sight. I had to use needle nose pliers to slip the socket into places then run the 1/4 drive extension into the top and on to the bolt head otherwise no way would it fit thru the access hole on the left bolt. All in all doable if your patient. Do pay attention to thehow things go,use a digital camera if needed before removing each part.
Mine was really bad,sure is nice not having it floppin around now.