well if you would not of mess up the hex.. I would of try some heat. is any of it sticking out ? if there is you could weld a nut on it. If not drill a hole that you could put a easy-out in. and heat it. heat first then put easy-out in. Good thing is that passage only go to the pump and with it off you clean it out.Is it for a 1/2" pickup or 3/8 ? If 1/2 need to be careful it gets thin on the block.