Sooo... This is an idea

that I have been stuck on for a while and I really need to know if I am being realistic about it or just being stupid!
If I were to get my stickey fingers on a Saab 95 turbo and an intercooler (Dont ask me how but just know that its possible...) would it be possible to use it in my car to create some boost and jump the horses on my 540i?
Its a v8... I know I will probably need some custom tubing but other than that what costs would I be looking at?
What happens with the compression ratio and things like that?
Get back to me on this...
Just tell me if I am thinking like an idiot if I am... Even that would be helpful!
Haha... later