I'm just trying to address the issue of using the track's designated fuel, rather than put sand in someone's nether regions for wanting to run E85 in an E85 class.
With a motor tuned to run on E85, the 87 octane is one of the better alternatives after you tune the motor back for gas. But, I can also tune for 100 at the track. It's easier to tune for 100 from 87 than vice versa. The 8.5: 1 compression ratio of the 429 is much more forgiving.
If I give up a few hp, then so be it. I'm not overly concerned since I'm primarily in it this year for the experience and not worried about being competitive.
But, E85 is coming on strong with a lot of racers as a fuel. ECTA may want to consider creating an E85 class. But, that's up to them.
It's their sandbox. I just want to play.