Eagle crankshaft

Thanks for your tips guys.
Someone ask if the engine has blower, not.
My friend was concerned about a vibration in the car, we guess was a driveshaft with balance problem, than he decided take off the oil pan and found the crank cracked.
Only the rod bearings were damaged, all the other parts are fine.
About the balance, the front counterweight they have to take off some material to be balanced ok.

Br,

Minella