Sincraft, Hopefully Don will see your post. I think he knows something about those old engines.
I don't think you'd be happy with it. From what I understand about old 4/strokes, is they are powerless and heavy. For the money, it might be cool to put it in your Eagle. It should have about the same power as a 40 2/stroke. It might be cool in a Goldberg or Great Planes 40 size Cub.
I know what you mean about camera batteries. Don used three sets when he took the pics of my Stinson and 109.
Glad the Eagle flew well. How much junk did you get out of your engine when you cleaned it?
By the way, I'm normal. Just ask me. (Not Don)