You won't find a lot of info about this at your local racers club because those who know ain't talkin.
Essentially, you will need to rework the air bleeds, the metering block, PV restriction, the venturi's, and the N&S needs to be all metal. A big pump is needed as well.
If your under class sanction, talk to a specialty carb builder and listen to them. Your gonna pay for it though, I'll warn ya.
E85 on the street is pretty much pointless because of the mileage concerns. Even running 12:1 compression on E85 won't get your mileage back. It ends up costing a lot for little gains.