The power rating for the FI 865 is about what I would expect if a 790 were bored to the same displacement. That makes me think the FI valve timing is much better than the carb version, though maybe not identical to the 790. Since the reason for the 865 carb valve timing was to get the same emission reduction effect as an EGR system, they very likely programmed the FI to run clean enough that this is no longer needed.
