I'll try here. Most alcohol deals are about 11 to 1. I have run 12.5 to 1. Alcohol doesen't care and you can run clear down to 7 to 1, maybe lower. But you do get some oil dilution at lower ratio's like that. I wouldn't consider blown alcohol carbureation so that means injected and yes it is a little pain in the ass for the lake. But, you'll never go back to gas!
That said, most guys like 8 to 1 or lower for blown gas. Several ways you can approach lowering this Cr. One way is thicker head gaskets and larger bore diameter head gaskets. Another way is to have a machinest offset bush the pin end of the rod to move the piston in the hole, thus lowering your compression ratio. Are you sure your heads are 130CC's? I have formulas and can caculate your compression ratio options of head gaskets or lowering the piston in the bore. I need to know your present deck height and actual combustion chamber cc's.
Other's here will have to chime in on Blown gas and what you can get away with on pump gas as far as boost and compression are concerned. My only experience with blown gas was racing in the 80's in which we ran 29% over in a 6/71 on racing gas. We have no idea how much boost it was, only that 32% over didn't go any faster (end of the blower efficency we had).