the AVO turbo kit claims to be compeltely bolt on, and for the most part it. They reccomend no more than 6psi without buying internals and standalone EM, or an sti bottom end.
That will get you 265hp to the crank, supposedly 212whp, which anyone on here will tell you will not be enough to satisfy you, especially at the amount of work and money you will put into it.

If you do decide to go with the engine swap route, shoot me a PM and I will send you some sites that will help you with info and parts