Need your Z's Factory Service Manual? Download it here:

S30 (240Z-280Z): http://www.xenons30.com/reference.html

S130 (280ZX): http://www.xenons130.com/reference.html

Z31 (300ZX): http://www.xenonz31.com/reference.html

Z32 (300ZX): http://www.xenonz32.com/reference.html
-Also available online @ http://www.300zx.co.uk/cgi-bin/manual.cgi

Z33 (350Z): http://www.xenonz33.com/reference.html

Z34 (370Z): http://www.xenonz34.com/reference.html

Various other Nissan FSM's can be downloaded from http://carfiche.com/

Nissan parts catalog for various models (has Nissan part#'s & diagrams): http://nissan4u.com/parts/