I'll be frank you made a mistake doing that. I just had mine out making sure you mark the two parts is essential to balance. I took great care in marking mine, white out marks.
What you need to do now is put the new center bearing on and put the drive shaft back together. Then take it to a drive shaft shop to be balance. If their is play in the universal have them replace that as well. I didn't replace mine because I couldn't find any play, at 253,409 miles!
*edit* make sure you replace the center bearing itself and not just the rubber mount.