I am certain I have seen this somewhere already, but I exhausted the search function and cannot find it. The main writeup on the swap uses 1080 XJ6 IFS. Wikipedia says that Jag XJ6 was the same "series 3" from 1979 to 1992. However, other websites say there was a redesign in 1987 that made the XJ6 wider.

I have an opportunity to pull parts from a 1991 XJ6 Sovereign. Will this car have the correct IFS for my 1948 F1? If it is unknown, what measurements should I take beside hub to hub?

Thanks!!

 

I found an answer to my own question I knew I saw it somewhere before!

For anyone still curious, I copied everything below from toddc's post in this thread: Technical ★TECH WEEK★ Jag XJ6 IFS into F100 - THE H.A.M.B.
"
Nice tech post.

I just thought I would add this, because someone will ask. 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.
"

 

Good information. Thanks for posting it

 

Yup. I agree. This is great info! Saved the link.

 

I just went through that HAMB link. Great info on the JAG installation! I do agree with one guy who said that the shock towers look a little weak, but he will find out soon enough. If he does have a problem with his shock towers, I hope he posts it. Great write up!

 

A mostly accurate way to tell is that the good donors have round headlights. It does not cover the XJS coupes, but for sedans, round headlights = good donor.