So Stuart,
In your own opinion- are you saying that, because of this, then the Jag unit is more durable than a dana 44?
AFAIK, Jaguar specified these modifications to the original Dana 44 design to increase the strength of the rear end. Can't see why you would have a reliability problem in a truck with a 350 motor up front; the late European spec. 6.0 litre Jag V12 cars had 335 BHP and still used the same rear end.
Also as Jockbolter says, the Jag rear ends are very popular for hotrods in the UK, Lots of these cars have small or big block motors up front too. Another thing about the Jag IRS is that they're easier to narrow than a solid rear end, lots of the Jag rears have LSDs in too.
Stuart.
