Hi Matt, very exciting times ahead with this build As mentioned already my350z.com is a very good resource on high powered forged engined zed.
You should have a word with the guys at GT motosports who are well known and even make their highly rated stuff and have their own turnkey power packages
http://www.gtmotorsports.com
Good luck with the build and keep us posted
Don't go to GTM, if you are going to ask anyone about building an engine then speak to Forged