My mate had a GTR specification manual last night and i can confirm it has the "FS" on the engine plate info, showing that it is a genuine V-Spec. (pics to follow)
Also has original auction sheet from japan, showing that the NISMO spedo was fitted after 2,000kms, and what mods it arrived with.
Has the additional pump adjacent to the oil filter, and the 4wd ecu in the boot is the Vspec version, checked with the serial numbers.
I will forward pics after this weekend to show the above
Cheers
Francisco