Hi,
Thanks for the help. I'm pretty sure the Profi was what I was thinking about because I remember the unusual positioning of the venturi and exhaust. It's going into an airplane that doesn't have a pan, so if I decide to get one the radial mount won't be a problem. It's an airplane my grandfather designed is the late 60's or early 70's. Don't think it is legal or competetive for any current speed or racing classes, just for fun. 17 inch span, about 88 inches of area. If it's too big for 1/2A I'll scale it down.
cheers,
Ken