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You are better off getting the crankcase half repaired to keep the pin in the factory location.
The bearing has spun from lack of lubrication.
The pin is really only to help assembly.
Once the crankcase halves are torqued the bearing crush retains the bearings in the bore.
Now you will be rebuilding the engine, I would ensure all the oil galleries are clear within the crankcase and the crankshaft.
Plus all the usual rebuilding necessities.
I hope this helps.
How did you go with your problem?
I hope my advice has been of assistance to you.