1965-1979 Ford F150 F100. These are bolt on steel Cnotches that work with lowering kits for extra travel.
For 1973-1996 Ford F150 F100 4" Drop Kit Leveling Lowering Shackles Hangers
For Ford F150&F100 1973-1996 4" Drop Kit Rear Leveling Lowering Shackles Hangers
1"- 2" Rear Drop Lowering Shackles Adjustable Leveling For 73-96 Ford F150 F100
4" Drop Kit For Ford F150 F100 1973-1996 Leveling Lowering Shackles Hangers
For 80-96 Ford F150 F100 3"F 4"R Lowering Coil Springs Shackles Hangers Drop Kit
1"-2" Drop Kit Adjustable Leveling Lowering Shackle For 1973-1996 Ford F150 F100