From my limited searching, alot of the import vehicles are fitted with 4.11's, I think 2002+ UK cars tend to be fitted with 3.54's.
Not all fitted with LSD, if fitting a viscous diff you will also need the matching cv joints as one of them has a step with a second spline.
KDT now has a casting for the rear of the diff that will allow it to fit the original rear chassis mounting points, still a bit more work to do but its close.