My dad has one that he rebuilt. Was rather rusted origionally, and he did the panel work himself, so its not the worlds best example of a fairlady. But it still goes just as well as a normal one, which is the main thing .
They're nice cars, though a bit... squishy. Had to get a smaller steering wheel on it just so that i could use the handbrake without it making my leg rub on the wheel. Don't really have much pull though, you might find yourself wanting more power, especially along the straights, (that's what a sr20det converstion is for though), but around the hills they're very fast. (about as fast as a mx5).