I found this web page last night, there are some downloads for 1000's and A10/A12 engine manuals ect.
The quality isn't great because it looks like they have been scaned in black & white instead of greyscale.
 
But if you are after the information and not too worried about the quality of the pics it's worth a look.
 
http://datsun510.com/manuals/index.html
 
Not everything that I downloaded from that web page worked, but overall im pleased that i had a look.