I am the creator of the site http://www.carpartsmanual.com. It's a hobby project I am doing in my spare time. It is not yet complete and I have not done anything to market the site before it is ready. But, somehow it has crept into Google's index. I am working on adding clickable-diagrams and cleaning up the part names. More work is needed on the popup windows also. Currently, only the engine section has clickable diagrams. If you click on a key number in the diagram, the part info will be shown in a popup-window.
When the 510 manual is complete, the next manual up is the S30 Z-series. Then, maybe the pickup's 520/521 and the 620. I have also published a manual for the roadster that I will move into the http://www.carpartsmanual.com site and update it to the new navigation system with better quality images. The roadster manual is available here: http://datsun311.partsmanual.net.