Oh, people blame all kinds of symptoms and conditions on ethanol. Sometimes they're right. Mostly they're not.
Do you have a '30s-'40s Chevrolet you haven't told us is really the car you're having problems with? I mean, since you're talking about Carter W-1 carburetors, and that's the kind of car built with that kind of carburetor, and I'm sure you know what you're talking about and aren't just picking scrappets from the interweebs that look relevant to you. You would never, ever do a thing like that…right?
Look, you made a bad purchase decision because you didn't know any better, and it didn't occur to you to ask people who know better than you before smashing [BUY IT NOW]. That's unfortunate, and there are ways of fixing the situation, but this little Debbie-stole-the-cookie-from-the-cookie-jar routine of yours (whatabout ethanol! W-1 carburetors! Octane!) is not getting you anywhere, and isn't gonna.
It's kinda like when you're stuck in the winter and you floor the accelerator and the engine revs and the tire spins and the car wobbles a little and when you take your foot off the gas…you're still stuck, only more now, and you've drawn a bunch of attention to yourself and now everyone has seen and heard that you're in over your head.
But you live in a country freer than many, so if you wanna keep going LA LA LA LA LA I CAN'T HEAR YOU NOPE NOPE NOPE WRONG WRONG WRONG WRONG in response to those who've been there and done that and know the causes, and you wanna keep being snotty to those pointing you at legitimate fixes, well: bless yer heart! That translates to Canadian as "Oh, sorry!".