Verdict:
Freeze plugs are fine, and new, but anti-freeze is pouring out of the intake manifold. Apparently instead of a gasket, there is silicone, which let go.
This mess has been leaking vacuum for some time. I've helped by putting RTV over it. Now maybe the mess will be fixed -- an improvement anyway. This is assuming we don't have a serious issue such as milled heads or whatever. I suppose I'll find out.
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