Cleaning used short block

Wouldn't that leave water in the block?

Well yeah I guess if you let it sit there like a total complete dipshit and not finish the job. But if you go ahead and put it back together and dump oil in it and bust it off and drive it, it will boil any water left in it right out. That's the hands down best approach I've ever used. The key here is not to be a dipshit.