Hello all. My parents have an 85 GT that was taken apart many years ago for a rebuild. My dad has since passed away so now I'm trying to complete the project. I've made a lot of progress and am almost ready to start putting it back on the car but still have a few little things I'm trying to figure out. For one, what goes in this open port on the front cylinder head (near cyl #2, mark3d by the arrow)? I don't see any unused connectors so I'm assuming it's just a plug but can't find anything to confirm. Any help would be greatly appreciated and be warned, I'll be asking more. TIA