ORIGINAL: SilverSeven
Though, I'm curious why you think the OPS would be wrong for this plane. Speed plane, speed motor, seems like a match to me. The OPS weighs less than the 91 you linked, and undoubtedly has more revs, maybe even more power.
Is your OPS like the one shown below? That should be a quick setup if the airframe will hold up to it. There was a thread not long ago about where you could get some CF props for this engine.