I don't know much about the v6's. I do know that you could definitely swap in a turbo motor for less than a v8. A lot of guys have done this kind of swap. Take a look on the web. I know you'll need plenty of parts that will cost (depending on the engine) plenty of money. The computer setup needs to be taken from the donor car, etc. Its a lot of work, and small things would have to be tweaked. If you plan on doing it yourself, but are asking the questions you've asked, I'd say you're not ready for the job. If you are having a mechanic do it, ask him questions and see what he thinks. In any event, good luck.

Roguls
New York, USA