What type of fuel do you use?

As the title states, what type of fuel do y’all use? I have a 440 with around 10.5:1 compression and an edelbrock 800 (I know I should’ve gotten a Holley) also have an edelbrock mechanical fuel pump. I have been using 91 octane ethanol free fuel but it’s hard to find anywhere but this one gas station on the other side of town. Do y’all have problems with the ethanol affecting your carbs? I’d like to start using 93 E10 but if it’s going to eat my carb from the inside out then I’ll just figure something else out.