Is this carbon buildup? And how can I fix this?

67DodgeDart360 said

How can I fix this if that’s the issue?

Click to expand...

Here is the list, in no particular order:

1. crossed plug wires
2. timing chain has jumped/valve timing off
3. bad cam lobe on the exhaust side
4. exhaust valve not opening due a push rod rammed through the rocker, or slipped out, etc
5. Ignition timing is off