Why is the steering wheel off center?

I just replaced my entire front brake setup (from 9" drum to K-H discs), including the lower ball joints, and now my steering wheel is cocked about 10 degrees to the left. The car still tracks straight, the wheel is just off center. I did not touch the tie rod adjustment at all -- I just popped the ends and bolted them back up to the new ball joint arms.

I don't think anything I did should have changed the alignment, so I can't figure out what would cause this. Unless maybe some component that I replaced was damaged, and the alignment had been set up to compensate for it.

Any ideas?

The tie rods adjustment is there to compensate for production variation in the parts you changed. The replacement parts are not perfect copies of the originals, and you've disturbed all settings by replacing worn parts (which it was likely last adjusted with) with new.
You need an alignment anyway, so the alignment guy will take care of it.

Thanks, I suppose that's it. I scheduled an alignment for Friday, anyway.

Just wear in the lower balls and so on could be "enough" to change the alignment that much.

The lower ball joints are also the steering arms and the new parts weren't machined exactly the same as the old parts so there is some variation between the two which will require an alignment.