RE: I converted a glow engine to run on E85
Go to a Walbro carb from a gas engine. You will have to make an adapter but it is not really a big deal. I run my Super Tiger .90 on the Gas/Glow system with a Walbro carb and it works flawlessly. As a matter of fact, at the field the other day a fellow flyer asked me about my setup because it ran so well and was so responsive.
You might be able to get a carb adapter for a Walbro ready made either from BME or Ken Lambert.
AV8TOR