Louis:
I swap carbs and other parts regularly. The challenge is that the TH carb's OD throat diameter is huge. I have a parted out Super Tigre carb that I think went to one of the monster ST's and its the only thing that fits. Hoping to find either an original Tower Hobby carb, or one of the Super Tigre carbs that will fit. I've heard good things about these engines, and I'm curious to see how it really runs. I've got an old 60 sized Kaos that wants to have a new engine dropped into it.