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Researching this IO-360-A1A

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Joined
May 22, 2021
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The engine in my Pitts is an IO-360-A1A. I'm trying to find out more about the engine but Google just isn't turning anything up for me. I'll attach a pic of the data plate, and also a pic of the top of the engine where it has a weird flat plate. I've never seen this on a Lycoming and I'm wondering what it's for. Any ideas of info? Thanks.
 

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