Reply to "E85 Gas"

I would say yes, I have thought about doing it myself but haven't pulled the trigger. Be aware you will need to upgrade hoses, fuel pump(new pump that will have a better diaphragm), E85 calibrated carbs are made by several companies now.
QFT E85 750cfm
I know a few of the EFI systems out now can be set up to be dual fuel, with the sensors to detect fuel quality. This way you can run E85 or gas and the EFI can seamlessly switch between fuels.
The tanks in most of our cars are aluminum and will be safe to run E85 without causing rust issues a ferrous tank can cause.
I have heard that some E85 fuels are not brewed the same from plant to plant. Where I buy it sometimes for my truck, the decal on the pump states "minimum 70% alcohol" So your results may vary.
Drag strips sell true E85, not sure of the price but with a true 85% alcohol level you can be assured of having consistent engine performance.
One last note, be ready to have a 30ish percent loss in fuel economy. BUT you will have a noticeable increase in horsepower, this is one of the benefits of running a alcohol based fuel.
Jeff
PS- If you want to have a high octane non ethanol fuel, go to a marina, or a fuel station near a marina. They will advertise REC gas, usually at least 91 octane. Be prepared to pay around $4-5 a gallon.