On a forum for the Colorado (same engine as our H3), there is a very long post detailing the development of a turbo for that engine. Looks like it will go over 400hp to the wheels although we may not be able to get that much because of our tranny. I already posted a question to the company asking them if they plan to do it for the H3.
http://coloradofans.com/viewtopic.php?t=8746