A few XJ questions

What is the stock caster measurement? My caster is at 8.5 and 8.6 degrees.

Also, after lifting my xj 4.5", I can hear a loud clicking in the front during the first ~20 yards of driving during the first drive of the day. It gets worse when I turn. What could be causing this? Sounds like its coming from the U-joints.

I am also getting some death wobble. I relocated my stock track bar when installing my lift. Could the wrong caster cause this? If not, what could?

Thanks in advance,
Jeep450r

In other words, what should my caster be at with 4.5" of lift? Should I have to change my caster settings?