What else do i need for turbo install.

Alright i have a 95 lewd with an h22a with 140k miles on it. i have decided to put a turbo on it,and hopefully hit around 250-280 hp with around 7-8 psi, and put together my own kit. So besides turbo parts, and piping, oil returns, intercooler, and wut not, wut else do i need besides 455 injectors 255 lph intake fuel pump, and i am also asking that if i also get a hondata system, how dependable will this car be granted if it is dyno tuned professionally. (Also what is a missing link?)

All help greatly appreciated
ROB

And Wide Band O2 Sensor??