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It appears you have a coolant line that feeds through the intake and throttle body.
That port in the head is probably a press fit with some type of sealant. It's got to come off and be reset.
A lot of people who don't live in cold climates have the V8 coolant place disconnected. The one on my truck was disconnected by a PO and it's never been a problem. You could possibly do the same.
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