These are the Jags to look for as donors.
They are called “XJ”. XJ6, XJ12, XJS, XJ4.2, XJ5.3 (where 4.2 and 5.3 indicate engine size in litres) Just stay clear of XJ40 series from ~1987 up.

This is a Series 1. These ran from 1968 to 1973. The front end is good, but the 6 cylinder version has solid disks and 3 piston callipers. The V12 version is “the same” as series 2. If the front panels are gone look at the dash, series 1 cars had the small gauges in the middle of the car.

This is a series 2. These ran from 1973 to 1979. Note that the front bumper is higher, US models have rubber bits on the bumpers too. If the front panels are gone look at the dash, series 2 cars had the small gauges in front of the driver. All front ends are good. Vented disks and 4 piston callipers.
( If you happen to find a 2 door version of this series don’t cut it up, restorers will pay $$$ for them )

This is a series 3. These ran from 1979 to 1987 as a 6 cylinder car and up to 1992 as a V12. Actually a very different car to a series 2, but looks very similar. Easiest way to tell them apart is by the lack of a front quarter window. All front ends are good, “same as” series 2.

This is an XJS. They ran from 1976 to 1997. All front ends are good. “Same as” series 2 or 3.

This is an XJ40. They ran from 1987 to 1994. Totally different front end. To me they look like they would work, but I’ve never seen it done.There is very little information available on swapping them compared with the earlier stuff. Best left alone.

Note: where I write “same” I mean functionally close enough, there are numerous detail differences that really don’t matter to a hotrodder.

XJ6 – 69-73 (Series I)
Girling Callipers/1/2″ Rotors
Ball Bearing Stub Axles
3.54 Gears
61 3/4″ wide

XJ6 – 73-79 (Series II)
Girling Callipers and 1/2″ Rotors but with Odd dust Cover
Tapered roller bearings on Stub axles standard 3.31 gears with locker optional
61 3/4″ wide

XJ6 – 79-88 (Series III)
Girling Callipers 1/2″ Rotors
Tapered roller bearings on stub axles with Drain hole in Stub axle flange
2.88 Gears Locker optional
61 3/4″ wide

XJ6/XJ40 – 88-95
Completely different set up, not recommended for aftermarket applications

XJS – 76-87
Girling Callipers 1/2″ Rotors
All Powerlock Gears
Tapered Roller Bearings on Stub axles
3.31 Gears
61 3/4″ wide

XJS – 87-89
Girling Callipers 1/2″ Rotors
Flat bottom diff with NO drain plug and 3 bolt mounted stub axles
American Dana Unit with weak traction lock (Not recommended)
2.88 Gears
61 3/4″ wide

XJS – 89-95
Girling Callipers 1/2″ Rotors
ABS on uprights/speedo pickup in rear aluminum diff cover
2.88 Gears
61 3/4″ wide

EZbus Reference Guide V1_0 pdf
Quickstart Tutorials V1.1 pdf

June 26: Big Kenny
July 23: Rhythm Devils featuring Mickey Hart, Bill Kreutzmann and Keller Williams
July 30: Easy Star All-Stars
Aug. 13: JJ Grey and MOFRO
Aug. 20: The Emmitt-Nershi Band

I thought it would improve performance to do the entire upgrade like this one here. However the upgrade just made everything shitty. Soon after the upgrade I attempted to playback a nice big video with mplayer and I got a shitty choppy playback and a shitty black flickering bar towards the lower part of the playback. So, I googled for a few hours only to find a ton of others bitching about this driver and how much Intel sucks for this. After readin about all i could fucking stand about the psb driver, one of my old i810 video tips came to mind. Appending “mem=” to your kernel boot line to specify how much memory the kernel uses, Leaving some for the video system.

In your grub/menu.lst find your kernel line:

kernel /boot/vmlinuz-2.6.31-16-generic root=/dev/sda5 ro quiet splash

Add “mem=SOMETHING LESS THAN YOUR ACTUAL MEMORY”

kernel /boot/vmlinuz-2.6.31-16-generic root=/dev/sda5 ro quiet splash mem=1000mb

Her mini 10 only has a gig of memory so I am using “mem=1000″, thats in Megabytes and there is 1024 of them in a Gig of ram so this should leave me 24MB’s for video.. if it needs it.

Wouldn’t ya know it, It worked.
Hope this stupid post helps somebody out. Please share your comments.