I'm just thinking here, because I don't have a slant around at this time; but-
If I recall correctly, the late slant heads had two different temp. senders and locations- one large port at the front of the head for the Lean Burn temp. sensor, and a smaller one further back along the valve cover rail for the dash cluster sender. I could be wrong, though- it's been many years and I'm gettin' old...
