Be sure to get your camber checked at the same time aswell as this is just as likely as your tracking to cause pulling to one side. Most garages aren't equipped with the necessary gear to check and set camber though so you have to search them out. The camber needs to be checked each time the suspension has been dismantled so if the car has had any work done like new bottom ball joint, wishbone components, shock absorber etc it should be setup again afterwards.
I swear by having it checked, I had my last two cars setup and they drove like different cars afterwards, staight down the line!
