Hy 29tons, here are the part numbers, beginning at the center and moving to the outside3658654, 3658656 right, 3658655 left, 3658658 right, 3658657 left, 3658660 right, 3658659 left, 3658662 right, 3658661 left, 3658664 right, 3658663 left, 3658666 right, 3658665 left, 3658668 right, 3658667 left. Interestingly according to my parts book the lower bars are the same Chevrolet or GMC, hope that helps.