Guit,
Ethanol was mandated in the Metro Atlanta area in about 2007. Every single vehicle I own is an antique and has a carburetor. I use ethanol fuel in all of them simply because finding ethanol free is somewhat difficult, and if you do find it it's over a dollar a gallon more.
All of my vehicles including the 1939 Packard and my 1950 Chevy truck all burn 87 octane without any problems at all. The Cadillac and the Toronado get premium. They both knock if I use lower octane. The Cadillac knocks because I advanced the timing beyond factory specs and the Tornado of course, is a high compression engine that requires high octane fuel.
Other than that as long as you don't let the ethanol gas sit around in there and go bad, you won't have any problems but that means you have to drive your vehicles.
If they're just going to sit around doing nothing, like that one with the water in the oil that just sits around and gets started once in a blue moon, by all means use ethanol free fuel.
I should also mention that the ethanol has not hurt the accelerator pump in my YF carburetor. Some people seem to think it ruins the black rubber ones. It's been over three years and 8000+ miles since I rebuilt the carb and it still works like a charm. I think the key is keeping your carburetor filled with fuel so the rubber doesn't dry out. You have to drive it to do that or at least run the engine frequently.
