I run a mix of E85 in the GN since all gas now contains 10% ethenal in the US didn't change anything except tune already had different fuel line. With a carb your need to run different gaskets and no rubber fuel line and somebody who knows what jets to run it taked a 30-50% more fuel delivery with E85. I have alot of friends who run 100% E85 in their race cars and street cars but most are fuel injected. Don't believe all the wise tails out their about eating everthing I seen motors and fuel systems that have run 3-5 years on it with no problems. It is hard to read plugs it doesn't look like Gas or Methanol when you look at the plugs you realy need a wideband O2 to see what ratio you are running.