^^^ That, plus Chalky seems to be the only ally with any muscle that Nucky potentially has left in his corner. He's not doing himself any favors by antagonizing Chalky. The previews seem to imply that Nucky may come to realize this soon.
Heh...my stream of consciousness on the "box" scene went something like, "Hmmm...that box looks big enough for a bod...oh...2 bodies. Damn". Not having seen the actual engagement definitely deepens the darkness of that scene.