[storm9c1]

OK, so if it gets hot in stop and go traffic plus pulling hills, that doesn't sound like carb jetting to me. Usually a carb-lean overheat condition will only be seen at speeds above 45MPH both pulling or cruising. And if your cooling system is up to the task, temps will fall back down when your speed is under 25MPH. But you are saying temps also rise at lower speeds, right?

I'm leaning toward cooling system issues now. If your rad was 30% clogged, I hope your cooling passages in the block aren't also clogged.