welcome from Gippsland, VIC. I think we need an OZ sub- registry and / or meet sometime for all the members on this side of the "pond" ( at least the Eastern states ?.. )
FWIW have a good look at the conversion before putting it on the road. We recently got a roady on an OBD ( 1990 extra cab ), and had to "re-engineer" the steering, power steer lines, trans lines, cooling, dash wiring, air vents and hood release ( plus some other stuff )
yes it had a compliance plate, and yes it was a Roadworthy truck when we bought it. Interestingly, after we fixed the steering ( linkage ) and power set up, it drives like a "normal" truck - turning circle good etc. All this stuff about poor steering that you hear from time to time seems to be just because the converters did a **** job to start with.
Good luck, and more pics please...