Herman the German - largest floating crane in the world was at Long Beach/San Pedro late 1970s, it could lift a DD out of the water.
I reckon lifting a turret out of the BB would have been well within specs.
Todd Shipyard in San Pedro had Herman. When they went bankrupt in the early 90's I attended the equipment auction mainly to see Herman. I think it was sold to another shipyard but I'm not sure.