450,000 miles? Dude, that's like 897,000 kilometers--if you guys would have bought an H3 out of country, your engine life would be tremendously greater! We need our Canadian friends to chime in here......
And 06H3--turbo? Are you sure about that? I''ve heard they're not desirable for 4x4's off road as they spool up at the wrong time vs. having the power on hand with a SC.
right, and they're absolutely useless on diesels.... uh, no.
turbos have an envelope of where they develop boost - a smaller turbo develops boost faster, but then is a restriction at higher rpms, a larger turbo is just the opposite. 99% of the time, the turbo is a compromise. With that said, dual scroll and variable vane turbos can alleviate that (as can dual, inline turbos)... but they have some down sides as well because of the complexity and physics. The problem with turbos is always heat and because of that, packaging the intercooler. Ford's ecoboost trucks, put the intercooler right below the bumper... not really the safest spot on a 4x4...
Superchargers can have instant boost (not necessarily true because it depends on the pulley sizes and the efficiency of the blower) and, if it's a roots-style blower it has a water/air intercooler, that is generally easier to package
blowers like Paxton superchargers kind of are the worst of both worlds because they take a huge amount of room.
and with all that said, there are books on the subject and I've left off more than I've added... turbos can work just fine on a H3, though, with that said, turbos with small displacement is kind of the best. In short, you have an I5 H3... turbo... a Alpha, blower for the displacement reason and the packaging reason as there is no room on an H3 Alpha to put a turbo.... ask me how I know, I dare you.
maintenance is on point, fingers crossed for 450k 
