He changed the centerlink to the 73/up unit because I think he was having an issue with the pitman arm being close to header tubes and the centerlink hitting the pan ... the stud points down instead of up so you have to use the 73 up idler also .
Yes, that was the reason.
I called Mevotech today and they won't do anything about it. All the woman would say is she agreed there is a problem with the arm but she doesn't know what. I said, there is only one thing it can be, obviously the i.d. of the splines is undersized but she made no offer of rectifying the situation. So, I'm going to have to eat the $40 I paid for it and get another arm.