Many of us are using Jag based rear suspensions. I found this book on a Jaguar owners website that has some really good tips on rebuilding and maintaining the Jag rear assembly. "Experience in a Book: Help for the Jaguar XJ-S Owner" by Kirby Palm.
http://www.jag-lovers.org/xj-s/book/
I don't know if you have to log in just to download the book. I have been a member there for a long time scrounging help from Jag owners that apply to Cobras. But if you do have to log in you can create an account and get the passsword emailed to you immediately.
The book is written for the XJ-S but applies generally to all current Jag rearends.
The pertinent pages for us are pp 360-378 for the suspension.
Also see pp 393-408 for brake tips.
It covers many tips on the Jag rear that I totally missed on my first Jag rebuild and won't miss on the next one.
PS: Just ignore the crack on page 378 about driving a go-cart!!
I loved the section at the beginning where he talked about whether it's an XJS, XJ-S or S Type. Sounded like some of the "Is it real or a replica?" discussions around here.