M1740/330-180 Rear of Rear Leaf Spring Shackle for (1967-1972) Chevy/GMC C10/1500 2wd, (1970-1972) C20/2500, and (1971-1991) G Series Van [9/16 inch Spring Bolt and 2.25 inch Springs] Fits 1967-1972 Chevy C10/1500 with 9/16 inch spring bolts Also Fits 1970-1972 C20/2500 with 9/16 inch spring bolts and 127 inch wheel base And 1971-1991 Chevy/GMC G Series Van with 9/16 inch spring bolts Contains 1 shackle