Hello, folks. Just acquired several airplanes and engines today, and along with the lot came a K&B engine with no indication as to size. It is fairly large physically, only four bolts securing the head, weighs in at 13.8 ounces, and has stamped on the left mounting lug "J2900045 and "made in USA" just above the lug. It has in large raised letters "K&B" on the right side of the engine above the mounting lug. That is all of the markings on the engine. It has a huge (wide)carburetor, and the head is as large as most 60's and 70's I've seen. Do any of you K&B folks out there know how to determine the discplacement of this engine short of measuring its bore and stroke?