For all you electronic gurus, what kind of wiring harness would I need to have the below headunit installed in the Z?

http://cgi.ebay.com/E244-6-5-TFT-LCD...QQcmdZViewItem

 

The standard Crutchfield one will get you started but if you've got the Bose amplifier you're going to need to by-pass or adapt the speaker levels down to line level.

 

Scosche makes an harness part # NNO3B for 350Z. Install kits are also available from this company but does not support a double din install. If your interested in a double din unit, look into the Metra kits for the 350Z. Paul is right. If you do have a Bose System (Changing your system is deffinately understanded), then a bypass is in order.