Only thing I could say now is......don't talk to your engine builder and try and get advice, go elsewhere.

As mentioned before, the higher the compressoin in a naturally aspirated engine the better, no matter what the application. Your only concern is the fuel grade you plan to use, then shoot for a compression ratio that your motor can live at. Best bet, talk to those in your area that have performance engines, see what they are getting away with, fuel quality varies from pump to pump, what may work in my area, may not work in yours. Good luck