Contact Tim Hewitt at Daytona Parts Company. He can give you the straight dope on ethanol resistant and ethanol proof carburetor parts. He has rebuilt virtually every carburetor on the vehicles in my care for the last 20 years.
Daytona sells rebuild kits for all carburetors as well as rebuilds them.
Tim is always happy to take the time to talk to you about your carb issue and help diagnose problems over the phone.
www.daytonaparts.com386-427-7108