^This. And I think the 996 heads will have the other holes for the intake manifolds.
I'm not an engine expert but I play one on the internet. There was a comment above that the heads don't crack often. Actually cracks around the valve seats and plug hole aren't that uncommon. My train wreck had one cylinder head that had been previously welded, and I've seen plenty of photo evidence and statements to come to the conclusion that it shouldn't be discounted.
As JFP (who is an engine expert) mentions, do a leakdown.
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