prop clearance thoughts vs engine placement

[OuterMarker]

Having an older Air Command which has not be modified, this inverted engine issue has gotten my attention. So, the nutty side of me had a thought and being a newbie to gyro flying, well, it seemed to make sense. So, I seek the wisdom of those who have gone before me with this question.

If if take my Rotax 503 which is currently inverted and rotate it 180 degrees so it is now running the way is was designed, good things within the engine should develop over time, as was pointed out earlier.

However, if I want to get closer to airframe CG, would I have to rotate the reduction gear assembly and perhaps go to a 4 blade prop? Using a four blade prop system instead of my current 2 blade prop would mean shorter prop blades (4" less), same thrust would be developed without getting into trouble with CLT location? I mean, is this a viable and less costly change without raising the seat and adding extra weight to the gyro in trying to get the engine thrust line and gyro CG in an optimum location? Just doing some out loud thinking....