Full scanned Factory Service Manuals for both the S30 and S130 models can be found at this site :
http://www.xenonzcar.com/s30.html
These are USA manuals but they are for each year of each model. Values are in both metric and imperial.
Scanned copy of an Australian 1976 260Z Owners Manual is attached for members information.
Datsun FSM L20A L24 Engine
Parts Catalogue S30,HS30,PS30 1969-73
S30 Colour Chart by Year
1972 S30 Heater Service Manual (US)
240Z 1971 FSM Supplement Chassis Manual (US)
1970 240Z FSM Body and Chassis (US)
1970 240Z Owners Manual
Scanned copies of an Australian and a US 1970 240Z Owners Manual are attached for members information.
Old website with interesting links
Members may enjoy visiting this site which was last updated in 2006. Check the home page for interesting links and Z cars advertised at not to be seen again prices.
http://zshop.net.au/240tech.htm