yes, you should be able to. Question though, where is it snapped apart at?
EDIT: I have an old style Dark Elf war hydra that litterally lost one of it's heads - which is an all-metal model. It was such a pain to glue back as it was the head that was twisted the most and farthest away from the model making it heavy. If I had to redo it over again, I would have drilled and pinned then glued.
- Lord Cedric