I know this may be getting a little of topic so please don't flame me.

My Triumph 2500 Saloon has IRS and sliding spline half shafts. Apparently like many other things - Datsun took that design - and the same bolt patterns etc and came up with a ball bearing based sliding half-shaft design for the datto 1600 or something.

Some people with Triumph 2500's do conversions to the datsun halfshafts 'cos they're better.

I have also heard of one person in N.Z> that fit a Subaru LSD centre to his Triumph.

I think therefore we may be talking about a similar diff. Which means of course I am very interested also in the outcome of this subaru diff installation as I may be able to do the same thing on my 2500 whilst also sticking the datsun half-shafts in.

If anyone knows more about these half-shafts that I may be tracking down please comment.