Eclipse d30 2000 16v Turbo

So first time hello I would have asked a question about the above car I would like to know what the inside has 4 cylinders or 6 cylinders and if 4s you could put in 6s. Then you can make it easy by chassis etc. What can you do on the engine you could install a bi-turbo. Ohso and I am clear that I would have to import the Turbo version from the Usa and there I have another question of the one EU and USA version and if so what is the difference, have read what that the GSI has a Chrysler engine in it. MFG N1lle