What would i need to upgrade my stock z24 engine before i turbo it???

You will first need to search becasue this topic has been talked about numerous times. You will find all your answers there. Not trying to soun dlike a jerk, but thats where I would start.

only if you plan to run lots of boost 8psi+ (i say this because i know you can run more probably safe, but its wise to upgrade if you plan to go past 8)

yes if you plan on anything more then 8 psi then you will need to upgrade your fuel managment, exhaust, all your internals of your motor. etc...