I bought a steam engine

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Pathetic progress, I know, but the engines have sat under a tarp on my truck for over a month. The problem..... I pulled two muscles in my left arm, and winter being what it is here, and parking across an ice dammed stream away from the tractor meant no means of removal. Until this week's thaw, that is.   

So FINALLY, I was able to get the tractor across the stream and 300 feet up the hill to the road, and with careful maneuvering of the busted left wing, remove the engines from their pallet, and put each in turn in the tractor bucket. We made it across the stream to just outside of my workshop. Here they are temporarily setting in the snow after twisting them out of the bucket. 

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Here is the "good" engine:

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And here is the "bad" engine. As you can see, the series of bolts below the breather indicate a repair plate had been added -- after a rod throwing incident.

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Also, the crankshaft has been sawed off, (left side of engine) just behind the flat belt drive pulley. This was apparently accomplished by the last owner to remove parts to build up the "good" engine. Unfortunately ..... 

Cut off shaft:

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Despite the injuries, I may try to resurrect the severely injured engine, since I have a working version to reference. And casting iron is still a possibility here.

Welding the crank may be possible if it's steel. I don't think the small flat pulley end outside of the crankcase really saw that much torque.

Pulley and a few spare parts tucked into the crankcase:

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Interesting view of the rocking inlet valve ports in the head of the "bad" engine: