Use this link to decode your model code
http://www.users.on.net/~goofyhsk/info/chassis_plate.html
It will help you decode everything except the last 4 letters, L, M, Z, G. The following is what i wrote back on page 39 of this thread about 10 posts down if you want to see my entire post.
I have been doing a lot of searching around on the forums for the answer to what the last letters mean on the model codes for the early model r32 GTR's (L,M,Z and G).
cameronbnr32 and garrysandy the only info i could find for you guys (and any one else wondering) was a post from funkymonkey back in 2004.
From what i read the letters L and M, which occupy Positions 8 + 9 in the model code, are known as VS Sign (VS Options)...
L means it has Projector Headlights
M means it has both climate comtrol + upgraded stereo
Letters Z and G occupy Positions 10 + 11 in the model code and are known as Pack Sign (Package Extras Sign)...
Z Im still not sure what it means but some guys believe it might be to do with the interior trim. RellikZephyr Thought Z = Black Interior Trim.
Cant be confirmed unless funkymonkey or someone else knows for sure what it means.
G from what i found means ABS and a Viscous LSD
Hope that helps a lil.