Dude... total BS!
The new GTR is not even out yet how the hell do you figure that your "importer" got you an engine from Japan's most top-secret car when nobody even knows what the engine will actually be? By the way that is a 350Z exhaust and tranny. The new GT is AWD and has dual tipped exhaust. Seems to me like you got your hands on a wrecked 350Z engine that just happend to have a TT conversion.
This guy is a scammer. Beware. Engine is probably beat to crap too.