Need Engine Schematics

I'm working on a 3D model of an engine and need suggestions for changes or major errors. I'm already aware of the problems with the cams, valves, valve cover and head (but since I don't have a reference for any of those, I've just been guessing). For example: "The crank shaft is backwards" would be a helpful suggestion.

Also, I'm looking for schematics, diagrams, or high quality pictures of everything possible since I don't have access to an actual disassembled engine. Does anyone know where I can find these? I'm shooting for either an H22 or B16, here's the work so far although it's obviously not accurate.

http://www.infofeast.com/users/jajimo/enginework.jpg