Been trying to set preload on steering knuckle caps ,put in new cups and bearings but cannot get proper preload. The caps I have do not have shims on the bottom caps.

was supposedly been a cj3b front axle. Can only get 4 pounds of pull with out any shims in top cap , I know u can put washer on cap bearing stud and increase pre load, but finding the right washer is gonna be a problem , how about new caps to cure my problem ?