PFC...
TBH the thing about my 33 was the epic torque curve... (2835prosftmfwin) it didn't need more than 300 so i just ran around on 98 most of the time.
if i needed to run e85 i just took the laptop to the servo, took the return line off, idled the car and drained the 98 into a jerry, then filled with e85 and swapped maps.