I have one of these engines I'd be willing to part with and its just like the nib version at the beginning of this thread. No number/size designation just the "G29065" on the mounting lug and then a "2" on the back plate. Its got the motor mount style back plate. Appears to have very little use on it if any. If I dont get any responses here I was thinking about putting it on Ebay but I'm in no hurry.
G29065 K&B