Is there a sending unit of some kind on the back of the driver's side head (points towards the firewall)? I have the coolant temperature sending unit in the intake, the oil pressure sending unit in the lower passenger side of the block, but I seem to recall one that goes at the back of that head. There's a wire for something in my original harness too. Does that sound right, or is my memory failing me? (Full-size 1970 w/455.)
That sensor monitors cylinder head temperature (not coolant temperature) and operates the "stop engine" light on the big cars.
That's the one I was thinking about! It looks like just the top half of a sensor screwed into the back of the head. Thanks guys!
