Sounds like the rings & probably the liners too are worn causing your problem with blowby by letting compression getting by the rings & going into the oil pan.If it was a valve you,d hear a miss (noise) in the exhaust & probably wouldn,t be running smoothly and have a miss.
Which parts of the pony motor do you need to see? The whole thing would take quite a bit of space.
Is the engine with the blowby the main or the pony motor?
I am still have some poney parts.
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