OK.
It's definately a Skyline. I don't know what a V35 is, here the 2-door Skyline is called the 350GT. And the GT-R is most definately using it's bodyshell (of course).
Don't worry, the 4 round tail lights are there! Do you really think after 30-odd years they're just gonna THROW AWAY the 'ol stove tops?
The famous Japanese 280ps limit? Well, for quite a few years now, the top-line sportscars from Japan have been sold "claiming to have" 280ps, but in reality, it's well over this (R34 GT-R for example). Remember, it's just an unwritten agreement, and manufacturers aswell as governing bodies etc are more than willing to turn a blind eye to the new GT-R's output, if it means it'll knock the Porsche 911 Turbo off it's pedestal...
...thats my interpretation. But when I asked my friend Kazuya (he works at Honda) about it, he said "Nobody cares about the 280ps"... so it's a gentlemans agreement, if you adhere to it, good on you, old boy.
But just watch all the new top-line sports cars from other makers come out with well over 300ps in '04 and '05.