I have plans for The Count Clipper and a pan, too. I have built several Rodents and rehabbed a Raider in the past. The plans show a K&B Greenhead. If I ever built a Clipper, I would use a Greenhead on suction.
Based on the small thin wing and the weight of the pan, I predict that this plane will be a terrible flyer. If you build a Clipper, select a reliable engine and the lightest one you have.
A Count Clipper flying would be an impressive novelty.