No boost adjustment
From the info I could find, the EB3.5 consumes 25 % more air than a stock 3.5 so I added that to the baseline 85% and set mine at 110%. With direct injection and lots of boost this number may peak substantially higher. Hopefully some smarter than me will chime in as I really can't find any concrete answers.
I have not messed with MPG trim adjustment, I'm not using torque to calculate fuel economy.
No OBD speed multiplier necessary IMHO.