Sorry if this is posted in the wrong spot. I replaced head gaskets on my 360 magnum a couple years ago and am just now getting around to putting it all back together. Of course by now I've forgotten where some stuff goes. I'm noticing a round hole with what looks like a foil cover and a contact to the left of the Distributor back behind the intake manifold. I can't figure out what attaches to it if anything.

 

Do you happen to have a photo of that part of the motor, so that we can see exactly what you're seeing? The only thing I can think of that's in that area is the oil pressure sender that provides the signal to your oil pressure gauge and oil light.

 

Oil pressure sender.