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8N Serial Number - Help

Tom I have what, by all appearances, is an early 8N. It has front mounted distributor and the fellow I got it from in Alabama said he thought it was a 1947 model but wasn't sure. I need to rebuild the engine as she is getting a little tired. The problem is, when I made the serial number completely legible, it was obvious that something wasn't right. The number is where it is supposed to be but does not conform the normal numbering pattern. The number is as follows: GP-9814, preceded and ended with a star. There is no 9N, 2N or 8N as part of the serial number, so I don't think it was swapped from another tractor.
I have been unable to identify this engine thus far. I know there were military versions of the engine during WWII and that the engine was also used in some Ford automobiles but as of yet, have not been able to determine if these non-farm-use engines used a different numbering pattern. Hope someone can help me solve this mystery.

Bob G I have an 8n that has an industrial engine in it. Mine has a magneto on it but it is a side mount dist block.

To rebuild it all you really need to know is what you already know. That it is a front mount block. Then when you get into it, you will find out what it has for sleeves. It may not have any sleeves.
Mine had an ID plate behind the cylinders on top of the bell housing.

Tom Yes, Bob. I forgot to mention that the engine has a bolted on cover plate for a fuel pump not just an unused casted boss. There is no tap for a temp gauge on the head but it may not be the original head. I read that the engines used in the Jeeps had a different displacement than the tractor engines though and slightly higher horsepower. That would make a rebuild a bit more complicated.
Would love to know what I have here.

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