its a good idea to replace the strut top mounts if your gonna have em all apart to do the struts anyway. but grease up everything. anywhere the rubber mounts will touch the frame, and make sure the bearings are set right. mine would squeek on tight turns until i pulled them again and greased em all up.
kinda like a poly bushing squeek. been fine for the last 25k miles tho.
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-2000 Grand Prix GTP
-Pace Setter Headers
-Pace Setter 3in Catback with 3in ZZP Res
-3.4in Pulley -DHP PCM - K&N Intake -Poly Mounts -AFC2.0 -KYB GR2 Struts -some other stuff