NMCA is Nissan Motor Co. pty Australia. Their gearboxes were fitted to Nissan 910 "Bluebird" with local content.
Series II were L20B Series III were CA20
L5 NMCA
forum
on the bell housing CA71B#3
ZL 71B #2 NMCA The front case can be fitted to 71C gearbox by modifying the front bearing.