Crankshaft bent in shipping? Wow, someone should get an award for that! LOL
Seriously though, before tearing the engine down, need to determine why the cylinder has low compression. Run what's called a "cylinder leak down test". It's simple, but you need an adapter to connect compressed air to the spark plug hole. Best to remove the rocker arms first so the valves will be closed. Listen for where the air comes out.
I doubt the problem is going to be rings. If it had bad rings, there would have been other problems, like oil consumption and oil blowing out the crankcase breather. Most likely there is a valve problem, or something as simple as a bent pushrod.
I would be very careful combining the 2 engines to make one. Honda's are known for "custom fitting" engine components, such as rod bearings, pistons, etc. Good practice for getting factory clearances right, bad for trying to repair them later.
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Today's Featured Article - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
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