This may help with the basic idea of the timing. [ http://www.twinturbo.net/nissan/300zx/FAQ/FAQpages/timing.html ] ... a timing light is going to be needed and I think I paid like 20-40 bucks at napa. Im sure its not the plugs like said before u'd have a noticeable miss fire.
Buying things I don't need to impress people I don't know.