Ever since i started modding GTA SA in 2010, i saw countless mods of Skyline R34 GT-R, and never found the right kind of model that is very close to the real world car (especially headlight shape, taillight shape, rim shape + color, rb26, etc)
Currently, this is as far as i can get by combining materials from various game. Base car is from Fast & Furious 6: The Game (iOS/Android), Interior and engine is from NFS series, Rims, exhaust, nissan badge on the trunk, brake disc, brake calipers are from Forza Motorsport 4.
For now, enjoy the view!