How much money?
Do you mean "how much money if I don't have the engine yet, have to find it, get it home, buy all the parts, then have a shop rebuild it and install the turbo and the complete exhaust system in my car"?
Or can you do some of the work?
In this case I suspect not, as he's asking questions at level zero.
Another factor: the first 100 hp is very, very cheap compared to the last 100.
A 300 hp 292 is easy. A 500 needs almost every part except the block and crank heavily modified or replaced.
