Well if it's a school project, how about we make a lesson out of it?
Calculate your compression ratio, and adjust the size of your combustion chamber to acheive about 9.75:1.
Check piston-to-valve clearance and make sure you have at least .080-inch at the closest point.
You'll probably end up shaving like .060-inch off the head - make sure it's perfectly level front-to-back, side-to-side, and corner-to-corner or else your combustion chambers will de different sizes. While you've got it all apart, clean up the chambers and the port roofs. You really can't hurt anything by doing so.
Have fun, take your time, and don't expect a huge power increase. You might notice a difference, but if these are the only mods you're making, consider it more of a learning experience than a horsepower quest.
Good Luck with it!
~SP~
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