(AM-9M) nut and washer assy. (attaches 4A263 to rear engine support)-M12 x 1.75 , STANDARD PART 4x2 with 5.8L, 7.3L, 7.5L engine and M5OD-H/D (ZF-5 spd.) trans. "Before 10/88"
(AM-9M) nut and washer assy. (attaches 4A263 to rear engine support)-M12 x 1.75 , STANDARD PART 4x4 with 6.9L, 7.3L engine and A/T