Does the diff housing have studs or bolts holding the centre in? If studs, it's a H145, if bolts it's a H150. If it's a H150, you could do as I did for my Sunny, which is to get a 120Y Borg Warner tailshaft with the 1 inch uni's .Next you get a series 1 Bluebird one piece tailshaft. They have the same size uni's & the rear yoke fits a H165 diff, so it'll fit your H150. Just swap the rear yoke onto the 120Y tailshaft, along with some new uni's. Or you could get the Bluebird tailshaft cut down to length & the A series front yoke fitted. I managed to find the tailshaft at a Nissan specialist here in Sydney, he said there wasn't much demand for the series 1 tailshafts, as the car came with a Borg Warner 4 speed. Maybe one of the nissan specialists in Melbourne can help you out. Hope this is some help.