Not sure if I can post this here or not, have a 188D for sale in Alaska out of a 74 580B. Will ship anywhere! If this is not allowed I will remove it, otherwise let me know if you are interested.
Not long ago a member was inquiring about a cracked block repair. He never came back and told us if he repaired it. Try contacting him, he may be interested in your block. HeavyEquipmentForums
Tinkerer, Thank you for your reply and I apologize for my late reply. This engine is no longer for sale, I do however have a block, reconditioned head and a crank for a 188D. Not sure on the condition of the crank, does have some surface rust on it.