Sid at Dropped Axles told me this a long time ago. You don't want to replace parts without checking the axle for wear. Sometimes these old Stovebolts have lived a rough life on a farm on in a construction business, etc. Sometimes the owners skip maintenance. For example, if a king pin and spindle are badly worn there is a good chance the axle is also. Where I live, the big truck shops do this kind of repair work all the time, but they are very expensive. Look closely at the condition of the old king pin where it sits inside the axle. Take measurements (ID & OD) looking for roundness. Even though a king pin is hardened, it can still flex and wallow the axle.
