If it's not a DD and you are set up for it already then yes. Just in case make sure you get the Racetronix rewire kit.
You can always bring extra gas containers to fill up. After about 2 or 3 tank fulls then you'll be all E85. No more mix. I'm lucky. I have 3 stations by me.
Even though it burns faster it's cheaper then 93 and it's cheaper then race gas. Doesn't matter since it's not a DD.
It's like running 105 oct all the time. You will gain much ore power especially if you drop a pulley.
Just to give you an idea about the greatness of E85. My setup is different since I'm turbo'd but I ran an 11.53 before E85 and had some KR. Went to E85 with the right fueling mods and ran an 11.11 pretty much without tuning. Being that I'm more modded, I needed to buy an MSD fuel pump voltage booster since I was running out of fuel.
You will love it if you do it.