get the idler arm bushings instead, unless the pivot on the arm itself is bad. The 78-80 is different than the 81 to 86, then it changes again in 87. Here is the part link: https://www.ebay.com/itm/Steering-Id...53.m1438.l2649 . It may not work if the idler arm is original - I remember something about that, but it has been years since I rebuilt one.