From what I have been reading, the mount points are different and honestly...I don't know if it is worth your time to modify.
Supposedly it is a true dual...with the exception of the muffler. I know that the routing is different versus the other 370Z version, but not absolutely positive (only seen diagram flow paths versus an actual cutaway view).
In this thread, there was someone talking about a similar project:
370z Nismo Muffler On 350z - MY350Z.COM Forums
I would hate to have you banging your head on the wall to make it fit. Not discouraging you...just worried that it might take more fabrication than worth.
But you are more than free to measure it as soon as I get it off.