How difficult and or expensive would it be for me to put a turbo onto my 87 NA? Would i need a whole new engine?

 

it'd be easier to just buy the whole TII engine. Places like fc3s.org sell jspec turbo engines for under $1000.
The big problem is that you need the TII drivetrain. The N/A driveline won't hold up for long with a turbo engine.
I say either swap in a jspec turbo engine+drivetrain, or sell your car and buy a TII.

 

you need a whole new car. one that says "turbo II" on the side....