A fellow should determine what fuel is readily available to him before he ever buys one part to build a motor, then build around that fuel. You'll need to do some reading to know how to figure static compression ratio. Once you know the SCR, you can do the math to figure DCR based on the intake closing point of the camshaft.
Here are some cheap, used examples of the math handbook on amazon. I buy used books all the time to save a few shekels.....
Amazon.com: Buying Choices: Auto Math Handbook HP


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