As said the 350z engine is a great engine although it does have its limits,hence some tuners changing to the Rb26 engine which as we know
is voted one of the most tunable engines in the World.
So yes it can be done.
http://www.topsecretjpn.com/gallery.shtm…
the company above do them as well as a 2jz powered 350z although they all top around 700bhp due to being drift cars.
So unless your after big power then mods on your already engine will do,but as said the RB will give you scary high bhp figures.And you have the advantage of having a decent project.
http://videos.streetfire.net/video/350z-…
350z Rb26dett conversion vid.
Import owner as well as skyline owner with RB power .