318 LA rebuild after losing a valve seat

Question: Were the intake gaskets metal or composition? Don't want a coolant leak inside and outside the engine. Most everyone here recommends using the composition intake manifold gaskets with an AL intake.

And did the cork end gaskets under the intake get clamped down well?

Snout bolt on crank damper torqued to 135 ft lbs?

Why do I think there is something missing from the front of the passenger side head in the 1st pix above? Like a freeze plug?? What is that circular 'thing' in that freeze plug hole?