Be it an O-200A or a D isn't nearly as good as if it was an IOF-200D! Continental managed to produce the IOF-240 for the Liberty XL to satisfy the American non-believers in a Rotax (and an IO-240 in the Katana).
What a missed opportunity not to put in an injected, FADEC engine in the nose of the Cessna. Can't be that difficult to mod the software and hardware etc for 40 cu in less!