Non ethanol or not ??

Just bought a Dart with a 11.5 compression 440, 906 heads. Talking with the owner he said at the current distributor advance setting, I should use octane booster while using 93 octane. Street car for most part.

My question is about non ethanol fuel. Use it or don't ? ..also use octane boost with non ethanol or stick with 93 octane ? ........... car is a beast !