I thought so as well, it was an option with the Cheetah Sierra series but looking at the page here Morgan Aeroworks - Cheetah the 3300 option in the Cheetah is not listed hence my confusion. From that page....
Power Plants
Jabiru 2200 - 4 Cylinder 80hp
Rotax 912 - 4 Cylinder 80hp
Rotax 582 - 2 Cylinder 65hp