Stock Toyota Celica specs call for 83 - 94 ft. lbs. depending on year.
As it is now a steel ball joint mating to an aluminum spindle, here's what I would do:
Just use a box end wrench to avoid damaging the castellations on the nut, and tighten the nut up until you feel that it is "good and tight". You'll know when the tapered stem has engaged the bore . You then nudge it a bit more until you get the hole in the stem to line up with any of the slots in the nut.
My best guess.
Steve