Hi Hal,
Yes, this was a topgun Mig that was coverted from ducted fan. I dont believe any mods where even made to the airframe for this powerplant. It was a bit anemic on the wren, as it was a original engine with 12lbs or less. In addition, he had a Bi pipe installed that was way too big for the engine...lots of thrust loss. Still, the plane flew nicely once on step and it was a blast to fly.
Todd