Isn't your prop the same as the ones recommended to a regular IO-360. The standard Mattituck OF-360 was 8.5 compression I think so there's no reason to think it shouldn't be ok.
I'm in the process of removing the FADEC from my RV-7A and installing the Airflow Performance FI kit and two E-Mags. I have a Whirl Wind 200RV so I don't need to worry about the prop.
Any body need FADEC parts - all good except for the #1 MPC.