G’day Slowy.
Got mine from Denis Welch Motorsport in 3.54 and mated it with an Auburn gear 19 spline LSD centre. Basically makes it a Dana 44. Vic Spiteri put it all together for me and it runs smooth as silk.. Not cheap, but I feel I’ll save in the long run!
As you know I’m putting around 600hp through it.
https://www.bighealey.co.uk/jaguar/axle-5?page=2
https://www.summitracing.com/parts/aub-542085
V&A Spiteri Jaguar - Independant Jaguar Specialists