It looks like Brillelli did it right. I'm trying to see in your photos if the carb adapter was modified to rotate the carb. Was any work done to help the performance? The Hannibal should be a good fit for this engine. I have this engine ready and waiting for me to build a plane for it. Let us know if you get some RPM numbers.
I have found that if I let mine run for a number of minutes without moving it around it seems that it starts grinding and almost locks up. The 3 ounces of oil hardly seems adequate. I think under normal operation the oil would get sloshed around enough. Has anyone else noticed this.

Rod S