That is an EXTREMLY broad question.
NA-T is a very well thought out process, and if done right, will be very reliable and rewarding.
Buying a 7mgte and putting it in is a bit risky in my opinion becuase your unaware of the condition of the engine. But if you have money, buy a spare engine, rebuild it and then put it in.
But this is one of those things,
If you have to ask, then you should stay Non-turbo.
And anyways, why do you want turbo? NA have plenty of power. If you havn't done your research to answer this question, you should not go turbo yet.
I am not flaming you, jsut letting you knwo you should definatly start reading!
-William