[classical glass]

Hi, I'm stuck between a rock and a hard place. I have a 427 Fe iron heads 10.5 to 1 comp ratio 2 600 cam 4 barrels. What pump gas would be the best choice, 91 octane non ethanol w/octane booster or 93 high test. I know ethanol beat the crap out carburetors but has a lower octagon level. I don't race my car l just want to enjoy it for weekends and trips without hassles. I have had to rebuild my carbs once I don't need to do it again.