Okay. Can someone help me with this? I have a '67 (off the assembly line in San Jose 12-1967) with a 289. It has the thermactor I would like to remove. All I'm seeing in the forums regarding the plugs involve four holes along the "rails". I'm guessing what I have is an earlier system because mine only has two holes needing to be plugged, one on the driver side towards the back of the head but still on the side, and the second one on the passenger side towards the front of the head but still on the side. I got the plugs that everyone talks about, but they don't fit. Does someone know the system I have and what I need to plug those holes up with??
Thank you.