Build it now why you are in high school and still have the time and resources to do it. Without going with some form of stroker, which I think that 76mm is a good bet for you, you will be pushing it to break 100hp with a 69mm crank. Most HP figures you see for motors are flywheel horspower not wheel horsepower because wheel horsepower takes into account a 15% drivetrain loss. There are many strokers that are just getting to 130 HP.
Check out
http://www.cal-look.com/tech/2007_vs_2165.shtml that should help you decide. And even he wasn't quite satisfied with the power so imagine how you will feel. Personally, the only way I would go under 2 liters is if it were turboed.
fast70