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It is indeed a right hand rotation engine and as you mentioned, the oil pump drive gear has backwards teeth.



I get the feeling that it is one of the industrial engines that turns the conventional direction but used a gear driven cam. Those cams were ground to run in the opposite direction of the crank.
The cam, cam drive, oil pump drive, oil pump, and distribtor are different. All other parts are conventional.
They can be dropped in a vehicle and used like any other engine. Just be sure to wire the distributor accordingly.

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