The physics of the situation is that if the wheels are set a tiny amount pointed IN then when they are turning fast they tend to pull OUT... hopefully that amount will be set just right so they are straight in the pulled out position..

If you take a front end WITH PLAY.... and " count the threads" ... then you have to be sure all the accumulated clearances are in the " pulled tight " towards the outside....

And that is almost impossible to do... so I suggest for the life of the tires... that after the new parts are placed on the front end... that the toe in get set.

Just old fashioned conservative mechanicing....