I think your limiter switch might have been sticky.
You gained a ton of pulsewidth on that log.
So I would back the WOT dial off a click or 2 at a time, and raise the boost a little at a time to make sure it stays rich.
E85 has a wide range of AFRs that it runs well at (like 10.5 to 12.5) so we just need to get it into the 11's for you.
Let me know if you are thinking of moving up to a larger MAF, so we can swap you to an extreme chip.
Bob