Save your costs & time
Just bolting on a turbo and turbo manifold???.... It's not just that. Alot more would be required. And I do mean alot more, plus the cost and time.
You would be better off by opening up your exhaust to 2.5 and your cold air induction, even have your head ported and polish with a nice cam along with a 60mm throttlebody. MSD system wouldn't be a bad idea either

That would be MUCH safer then what your thinking of bolting things to an N/A. If it was that easy there would be LOTS of Turbo's running around
My 83ZX was an N/A and the only proper way of doing it would be swapping the whole unit over along with the add parts and wiring that goes with the ZXT's.
Time and Patience and a FSM
Donna