Do about a month worth of research (If you're quick), or two months, if you're the type that asks questions that've been covered comprehensively 1000 times over.
Put the research time in. Otherwise, you won't have the knowledge to know when something isn't going as planned.
also, make sure you have the downpipe flange off of the 300ZX, cause it's a unique turbo, and you'll have a hard time sourcing one.
-PHiZ