my steering wheel was about as accrate as the one in them little tykes red and yellow kids cars, I stripped th steering box, replaced the peg, and the bush in the coloumn and the bearing in the column and the rubber coupling to the steering box, fitted my new mcj boss and wheel.... hey presto i have van that points where i want it to when i want it to rather than when ever the road wants to move the wheels!
Mine was an accumulation of issues, the peg was nadgered, massive flat on it ( prob due to incorrrect adjustment at some point) the rubber coupling was cracked and degraded, lots fo flex and play the oil in the steering box wasnt the right stuff, the column parts I replaced as I had it all apart and thought what the hell I will just do it.