I don't think it's necessary to have pictures of the stock engine, since it is the head that I'm trying to modify/fabricate. The head from the stock engine is going right into the trash.
But if you still want to see it, here's a picture of the engine with the head off from Berkley's site:
http://www.ckmcgraw.com/afmcgraw/smv.htm
They used a 50cc Honda, which is still too powerful to power the vehicle.

It's for the SAE Supermileage. It's similar to the shell, but the main difference being that everyone starts with, and has to use part of the same engine model, and it's only for college kids.
For comparison, the best mileage from SAE is just over 3000MPG. The best mileage from Shell is over 10,000MPG.
It looks like Berkley did a lot of modifications: EFI, overhead valves, pressurized lubrication, etc. But they still only got around 2000MPG I think. I wonder what their compression ratio is. The compression ratio for the top Shell teams are around 16.5, which is the most efficient. Any higher and piston ring friction from the high pressure takes over and you get a reduction in efficiency.


So back to the issue, how difficult is it too fabricate an engine head? I imagine it would be much simpler if I used the cam and valve assembly from another engine.