Help with DIFF. drive flanges.

[snapper]

There are 2 sizes of diff 7" and 7 1/2" there are also 2 sizes of Lobro, 100mm and 108mm diameters.
There are at least 2 thicknesses of drive shaft as well.

I think at this stage i would fit any diff that i had and save the LSD for another day post build

Or

take it to a diff specialist, it may be a simple fix for them.
Andy Bates at AB performance has a diff man he uses for swapping crown wheel and pinions to produce a 3.3 or 3.1 LSD, worth a call to him.