Jerry is correct. It is very unlikely that your steering box is skipping teeth. If something inside was broken it would more likely be sloopy loose or it would lock up and not work at all. If you did not ream the bushings after you installed them in the spindles, they are probably too tight and misaligned. Did you have to force the kingpins in with a clamp or beat them in with a hammer? If so, you have a problem... After installing new bushings in a spindle, they have to be reamed so that the kingpin will slide in with gentle pressure. THEN.., after the bushings are properly reamed, the spindles are assembled to the axle and the kingpins locked in place.

The symptoms you describe sound like the kingpins are so tight that the steering doesn't have any "rebound" (the steering comes back to straight on its own) and it just stays wherever it was pointed last. IF that's the case you'll need to take it back apart, rent a reamer from the local parts store and make the necessary cut. While you have the steering box disconnected from the front axle you can check it for slop and rough spots. If it operates smoothly it's good to go.