The Jenno - Bruce engine's crankcase, backplate , head and NVA were made by Charley Bruce and Larry Jenno.
The crankshaft, drive washer, prop washer, nut, piston,rod, and cylinder were stock Fox .35 parts that Charley bought from fox manufacturing. I have one of the engines, and disassembled it. The only departure from stock parts were two holes that were drilled on the bypass side of the piston by Charley Bruce.
Mine is mounted on a plaque with 11 other Fox .35's of differing years. I also have a black Fox .35 anniversary model engine mounted there.