Iv got an XH II tradesman (one tonne) manual. It has the standard 6cyl and 3.27 single spinner. I was wondering what LSD diffs I could use whilst keeping a relatively similar ratio. The least effort the best. Any help would be much appreciated.

The easiest option would be to find an XH rear end with LSD already fitted, most XR6/8 utes would have had them, and a lot of tradesman and Longreach ute would have had them too. Mine does (Longreach) but my spare one (also Longreach) doesn't...
Look around, you'll find something.

A good diff shop can fit an LSD to your diff, but it can be expensive.

I believe E-series wagon diffs will fit, but i've never tried it.

Good luck.

Thanks a heap, do you or anyone else know what ratios the e-series and XHs had in LSD?

3.45:1

. . . and 3.23:1 also for the XH utes.

Probably wise to steer clear of the outback hydratraks - the viscous unit can't be serviced AFAIK.