So I went to sun n fun and ended up buying an engine. Wasnt planning on that but it was right place right time situation. It is an IO-360 with duel p mags and 9:1 compression. I called hartzell about the compatibility of the blended airfoil 72" and he said that prop has no restrictions up to 8.5:1 with magnetos. He said that doesnt mean it wont work, there is just no vibration data to support it. Does anyone have experience with this combo?