Holy crap, those are bad!
I'm not too bad. Just got back from dropping the wife off at the airport and then a trip to the grocery store. I may have overdone it a bit, but I'm resting now.
Just a few small holes in the knees. Arthroscopy is pretty advanced these days.
Let's see...
Towelie, I'm guessing that the first production 914 was made in August 1969. That's when they switched over model years, so it makes some sense that the first ones would have been then. I could probably look up the actual date and serial number (VIN? Would start with 47029 ... Might end with 112?) in my copy of Das Grosse VW-Porsche Buch, if I could find it. And if I could actually read German.
Timothy, it was a pressure sensor that lived in the engine bay. I don't know how it worked; I haven't taken one apart. I don't think they did anything to the ECU to accommodate it, so it would have to modify the other sensor inputs. If the FI wiring harness has a plug for it, I bet it would work.
Jeff, if the wiring diagrams are correct, all of the 72+ cars had at least some wiring for oil temperature gauges. The 72 wiring was weird, though. AFAIK, 70-71 would have identical wiring, and none of the four-cylinder cars would have had provision for temp gauges. But you said "model year" singular, so you probably have something in mind. So I'll flip a mental coin and say the 71 model year.
Going to put ice on my knees again shortly. The cats are happy to see me staying in one place for so long; it gives them a nice warm person to perch on.
--DD