I'd suggest the Exedy Safari Tuff - put one in my HJ61 and then immediately drove it 5,000 kms to Death Valley, around all over the place, and then back over the Christmas break. Great clutch, very smooth, very strong - heavy pedal even with the vacuum assist.
Talk to Roodogs - Trev - at the Melbourne Super Store and tell him 'John from Canada' recommended you call.
Make sure who ever does your flywheel puts the proper step into it, lately we've seen a few machined flat and it really doesn't work well that way... at all.
~John