I'm sure if you put the right rear end with the six speed it would be ok...
I haven't tried it, but I saw the 350z gear ratios online somewhere and they looked to be a very close ratio, but that would work with a turbo car if you used a, say, 3:54 or 3:7. It all depends of course on which motor your going to use with it also....
I'll put it this way, if it would bolt up to my RB26 with no drama, I'd give it a shot in a second....