Spend plenty of time with solvent, soap, and water on the crank when you get it back. Seen many rebuilt engines have an early demise due to stuff breaking loose in the rifle bores of a turned crank. On rebuilder engines, I either ask the machine shop to plug the crank or add them myself before being turned, that way they can be part of the balance. The plugs allow for the rifle passages to be opened up and cleaned. I have also used some carb cleaners with wood plugs to allow the cleaner to sit in the crank oil lines longer. I hope you get it back in time, now is the time to consider what else you need to put it back together, main and rod bearings, gaskets, carb kit, oil pump, belts, alternator, hoses, fuel pump, fuel/water filter, spark plugs, paint, sensors(oil and water temp), ignition components, exhaust gaskets, etc.