I am rather ignorant when it comes to the rear end of my XJC. As I am starting to see the distant end of the world i am doing on the front end of the car and engine / transmission (THM700), I am starting to toy with the idea of acquiring a spare IRS to rebuild while the car remains on the road (if it ever gets back there…) for an eventual swap.
I read things about diff ratios, and posi and outboard brakes etc that make me wonder what the “best” options would be for my setup (respect for original is no longer my concern).
There is no shortage of XJ6 and XJ12 and XJS in junkyards around here so I could certainly pick and choose more adequate than stock, if only for the fun of it.
So folks, what poison would you recommend and why?