Yeah, mine squeek right now too... The car is up on jacks with the nutz for the control arms just hand tightened. Waiting on my D**N springs. I lubed the cross shaft with some lithium grease, hoping that will make things quiet once everything get tightened down... I'll be one ANGRY person if they still make noise once it's all assembled.. Remember to get the weight of the vehicle on the suspension before tightening down the control arm bolts. I'm going to use my Rhino ramps for this.
BTW Did you ever get the LOWER balljoints in?