have you ever seen this before

I have been told that if you have a bad head gasket the coolant leaking into the combustion chamber steam cleans the carbon out, and the top of the piston and combustion chamber will look clean like that when you take the head off, in fact you can tell which cylinder has the bad gasket just by pulling the plugs and looking for the clean one.

Is it possible that those two intake runners had coolant leaking into them either through the intake gasket or a flaw in the intake? Is it a "wet" intake?

Idea number two is if the fuel leak that caused the fire also allowed fuel to be drawn into those ports through the carb washing the carbon off, or whatever was used to extinguish the fire got in there?

I also thought, as was mentioned, if those two intake valves were actually functioning - due to a bad cam or improperly installed rocker.