I have a 29 that looks exactly like it. A 29 will have the displacement stamped on a lug, and a very thin venturi insert. Mine runs a nice 2 stroke with a 10-5 on a Flight Streak. Had it out this afternoon and it was great. Stunt engine - you have to be kidding. Lots of fun. If you don't want it, I would be interested. Probably a mental deficiency, but I like those old things.