Right now I wouldn't even try to drive it to the gas station to put e85 in it, but yea I was planning on 50/50. I doubt it can even back down the driveway currently. When I tried to run the 83mm maf it acted like this on stock injectors. Hopefully I can get it going enough that I can diagnose some stuff. With more fuel hopefully more air will help.
I am running 550s on stock MAF with SAFCII. It worked fine for pump gas with a bunch of negative correction, and even better once i started running 50/50 E85 so that i could run less correction. Did you plan to start running some E85 eventually? If so, and the amount of correction you are running turns out to be an issue, you can try that sooner rather than later.