I don't know about the shutdown procedure Ken, but leaving the mixture lean during descent and landing is a procedure I have followed for years. Go around is just everything forward, starting with mixture, as you said. I didn't know about the cylinder cracking aspect (and I have not had that problem, even with the 206 I used to own), but the 360s on Skymasters tend to load up at lower power/full rich and the spark plugs get fouled. Leaving it at cruise lean prevents that problem. Since the power is well back, there is no issue with running too lean.
Interesting point, thanks!
Kevin
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