Cracked block cause?
That is a vibration crack from spinning up a severe out of balance motor. Seen it on other engines that came in. That engine probably had a internally balanced converter in the past and was abused. We just got a fresh 440 race engine in that had an off center torque converter pump hub welded on. The engine was fresh and lasted to week ends . Same crack up through the center. Big blocks and 360's are weak. one reason the Hemis had side bolt mains. We offer that application to all BB customers.
That is a vibration crack from spinning up a severe out of balance motor. Seen it on other engines that came in. That engine probably had a internally balanced converter in the past and was abused. We just got a fresh 440 race engine in that had an off center torque converter pump hub welded on. The engine was fresh and lasted to week ends . Same crack up through the center. Big blocks and 360's are weak. one reason the Hemis had side bolt mains. We offer that application to all BB customers.