Carbs or fuel injection? No one makes a "kit" for the Z but plenty of people have done universal harnesses from painless, summit etc. The biggest issue seems to be that these kits all require a bit of work to make them work with the stock steering wheel mounted controls (turn signals, wipers, flashers etc)
here is a link to a thread on another forum detailing the process
http://forums.hybridz.org/topic/29786-p ... bo-switch/