you sure that walbro is gonna work with the e85? chances are your going to have to run a shielded pump because the static electricity that comes from using a pump like that can cause A LOT of issues with e85, just fyi. Also Im not entirely sure that one 255 pump can feed the additional fuel needed for e85, please take into consideration that a fuel with such a high concentration of ethanol 85%, (hence e85) needs to be delivered in a higher quantity than normal gas, typically 30% more.
also the sc61 is small, you just don’t know it yet.