210° @ Cruise and 180° @ Stop? What's Going On?

Some of you guys might want to check your valve lash or preload. I have an older mechanical rocker arm set up with the iron arms and adjustment screws in my 360. My engine would always get a bit hot, so after going through a few things I decided to check the preload for ***** n giggles. I dont know if the lifter plungers decided to act differently after some miles were put on the car, but I took almost two turns out of all of the adjusters to get the preload to a better adjustment. Temps are down and I have more manifold vacuum. Might be something to consider.