Carb rebuild kits aren't usually a problem, those can be found with ethanol-resistant parts. Same thing with soft fuel lines - just use the Gates "green stripe" hose and it'll last. The bigger problem now is mechanical fuel pumps. Might have to switch to an inline electric pump to prevent ethanol-related problems.
“Might have to switch to an inline electric pump to prevent ethanol-related problems.”
You have to go in the tank in order to keep the pump cool enough to not vapor lock. Heat and or altitude will exacerbate it.
I'd take an old mechanical pump and reconfigure it as a "flow through" dummy pump...just for looks.
Get a low pressure solenoid type pump, you can hide it inside the frame rail...and there is a special oil pressure switch available from Standard Ignition, which (with or without a light) will shut off the power to the electric fuel pump should the engine stall or be shut off.
That way you can look stock, but continue running your old-timer on the gasahol.