[LONGHAIR]

Originally Posted by Dale99

So when going back together. Do I need to back that spanner "bolt" off, torque bottom bolt, then screw it down to make the top ball joint tight, then, torque the top bolt?

Both the stock one, and the after market one that came with the ball joint look centered. I thought they were to be off center for alignment?

Yes, though all of the uppers I have done had a new tapered sleeve. (Spanner bolt, your term)
I have always changed it, just incase there was some variation in the angle of the taper.
You torque the lower nut while the upper is "backed-off", then torque the upper sleeve, finally the upper nut and cotter pin.

The sleeves are all centered, there is no alignment adjustment in the ball joint, and there should not be a need for it. The only way for it to get out of the correct alignment is for something to be bent/damaged. "If" there is some need for adjusting (compensating) the camber, it is done with a tapered shim that goes between the spindle and the knuckle.
The caster is determined when the spring mounts are welded to the axle housing. It is also adjustable via a shim, but would never go out of the original factory setting because of wear or use.
The "toe"adjustment is really the only one that is truly intended to be adjusted.