I have a spare T50 box if anyone is interested, as well as some new synchro rings. I installed a lower mile box in along with a BT flywheel, don't need 2 trannys! Shifted great, had a minor issue occasionally kicking out of first, trans shop opened it up and had a look at it, said it was probably weak shift rail detent springs. Trans shop said other than new detent springs all this one should need is re-sealed and gasketed. Not sure what is involved in betting it from USA to AU, if interested let me know and I will see what I can find out regarding costs/methods (unless you have experience in such matters)