Here's a pic of both sensors when I got the car. Yes the whole engine bay was pretty nasty. The PO had no connections to the upper sensor, it was just left as you see it in the photo. So along with the fact that I don't know much about points-type distributors, and that the car wasn't running when I bought it (took about 3 months to get it going), and I wanted to make the air, fuel, and spark systems work as efficiently as I can, I went with the Centerline ID405 dizzy and a new blue Bosch coil. Effectively, I could set it and forget it. Haven't had an issue with it since.