This is most likely a really stupid question but is there any difference in the fairlady and the 300zx. Ive been told there was only so many (few) fairladies imported back in the day, if there is any differences what are they?

Fairlady is just the name the 300zx was given in Japan, but to the rest of the world they used the name "300zx".

 

There are differences between UK and Import, they can be found here : http://www.300zx.org.uk/mod_comp_1.htm