[rustbucket66]

One important thing to remember is to mark the middle yoke and the driveshaft tube before you take it apart, so it goes on the same position when you put it back together. You could put it back together out of phase, or in phase but 180 degrees off how it was when it came apart. It is balanced in the position it was before it came apart. Put it together the same, and there won't be any vibration or balance issues.