Car Clubs: Are there other Clubs devoted to either the 300zx or Datsun/Nissan ?

See above re New Zealand. Overseas there are many clubs both for Datsun in general and the 300zx in particular. Most of these clubs are local or country specific but most of them have some sort of internet presence.

One of the most famous is the IZCC (Internet Z Car Club found at zhome.com) which caters to all the Z cars from 240 onwards. There is a forum for the 300zx specifically but I find the level of information to be more along the lines of our own club on one of its lighter days so perseverance is required. Once you have found one of these clubs there are usually links which will eventually lead you to most of the rest of them.

Zhome above is a good place to start. Some have extensive technical articles. There are plenty of other sites which cater to performance parts or general parts. I have over 150 sites bookmarked and a list appears as the last point