This is in a Christavia Mk4, high wing tail dragger. First flight was 17 September 1994. Let me know if this is the right format for the picture. I have more pictures to send if this works. Andy This was one of our early engines.
Plugs up is a great newsgroup that has an ongoing forum that everyone participates in.
Here is another photo of my 13B Plugs up installation. This shows more of the front of the plane. Again the plane is a Christavia Mk4. It is a high wing tail dragger, and is built like a tank. Ross Aero drive pulls this plane around nicely.