Drew, if you ever have to tear apart a kingpin~lower A frame, it will become obvious to you very quickly. They can be frustrating little buggers. I generally just bite the bullet and replace it all.
Jacks problem was that even with new components, the large portion of the fulcrum bolt had some minor glitch with the threads, preventing it from being installed properly.
Look in your service manual at the exploded view of the front suspension, and it should all become clear.
Jeff