Hotchkis 18390 Rear Suspension Package, Adjustable, 63-72 C-10 - Manual (Page 13)

1
Remove Stock Track Bar
Remove the stock track bar by undoing the left frame mount bolt and the nut
attaching the track bar to the rear end housing. Retain the frame mount hardware
for reinstallation.
2
Install Track Bar Mounts
Grab the driver side track bar mount and install it on the existing frame mount.
Use the original bolt and nut. Do not fully tighten this bolt yet.