You pretty much should replace the seals and not try to reuse them. Here is a link on how to replace ball joints that covers in detail how to replace all the seals and what you need. You'll have a lot to read but it pretty much covers everything.
Edit: correct link
https://www.ford-trucks.com/forums/3...ll-joints.html
Last edited by Monster-4; 10-17-2007 at 08:54 PM.