My new block didn't have one, so I tapped the hole and used a threaded hose connector. I think I have one in brass and stainless steel. If you're interested I can send the tap and hose connectors to you. You might be able to loosen it by driving it down (just a little)with the proper diameter socket, pipe or whatever and then pull it up.(You might want to stuff a rag down the hole to catch any bits and pieces).
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