I have recently heard of a good deal on a O-360. It is so good that I am considering putting it on my restoration project. Mine originally had an O-320 e2d. My -320 needed to be overhauled anyway and the asking price on this engine is less than what an overhaul would cost. It has approx 900 hrs and is on a currently flying aircraft. I was wondering if anyone has done this and how much needed to be changed?