Here is his full build thread, but it is the last couple pages we talk e85 with the GTM kit:
dmhenderson's Nismo '12 GTM supercharged build thread where I freak out a lot
He is currently working on a couple issues to finish it up, but looking positive. The only negative I see to e85 for us, is we are static with our boost. So we run xPSI and throwing on e85 might give better cooling and allow a little more timing but to see full benefits we might have to bump up the PSI or generate better flow in/out of the engine to great that perfect efficiency setup.