In Smokey's book he said cast cranks move around in the motor quite a bit and not to get wrapped around the axle on this. Set the crank horizontal with blocks on the very ends of the crank with the high side up and it will be runout the other direction before too long. Don't sweat it.

"The first rule of overkill: You can never have too much overkill."
"Overkill is underrated."