Now’s the time to do all your research. It will take longer than you think, and you’ll probably revise your plans as you go (and learn).
I have this book and it gives a pretty good overview;
Maximum Boost: Designing, Testing and Installing Turbocharger Systems (Engineering and Performance) [Bell, Corky] on Amazon.com. *FREE* shipping on qualifying offers. Maximum Boost: Designing, Testing and Installing Turbocharger Systems (Engineering and Performance)
www.amazon.com
Used ones can be found cheaper, just do a Search for that title. Also check your local library for similar books.
Good turbos aren’t cheap, and I’m not aware of any kits being offered so you’ll have to do your own engineering.
Don’t be tempted to try a salvage yard turbo to cut costs! Those turbo systems were engineered for the engine they were mounted on, which is likely to be far different than your application. Plus it’s a used and worn turbo.
I don’t know what the compression ratio is in a 4.3L but 9:1 is pretty high for a turbo application. IIRC a factory turbo car is usually around 8.3 to 8.5 :1. An unnaturally aspirated engine runs best with a cam with wider lobe centers, say around 112 degrees or so.
