RE: What Engine Is This
It looks like the old Malonie that some one tried updating from glow fuel to gas and ignition. The koritz's i believe had the side mounting rail's like the bigger ( 2300 to 3200) supertigers. The Malonies had a radial cup mount on the rear to bolt them to the firewall. I may be miss taken,but i'm betting on it being a modified Malonie.
Good Flying
Art