This evening I started tearing down what I thought was a 2.3 m20 when I came across seeing a 200 head on it. So I started looking at the block and I found this # 27 6E A. Can anyone help me with what this is? I know that U.S. spec 2.7 are 27 6K. Any insight would be help please. The number below the top row are 00285831 if those numbers are needed.