Hey I have a 1984 K20 with werner auto locking hubs.
The description for 1980 sounds more like the setup I see where the washer with small holes that sits in the keyway of the spindle locks to a pin with the adjusting nut.
Should I follow the instructions for 1980? 160lbs just seems really high.
4. On 1980---84 K10---20/1500---2500 vehicles, proceed as follows:
a. On 1980 models, assemble adjusting nut lock by aligning nearest hole in lock with adjusting nut pin. Install outer locknut and torque to 80 ft. lbs.
b. On 1981---84 models, assemble drag sleeve retainer washer over the axle shaft and against bearing adjusting nut. The tang on the inside diameter of this washer is assembled in the keyway of the spindle. Assemble and tighten outer locknut to 160---205 ft. lbs.