after searching for a engine for my wrx managed to find one went and see it in the car running all was good until i recived it by courier it has a broken bolt in the block where the water pipe transfers from head to head have tryed to drill it out but no luck doing so any help would be greatley recived

 

you can buy a bolt removal bit for a drill, or get another bolt and weld it to the broken bolt and undo it that way, its what i had to do on a broken bolt before, works well