Overheating headache

I have to agree with AJ here. I believe what you've done with the pulley, although it helped, is acting like a band aid for the real problem, whatever that might be. You're in Florida in the winter. What's this going to be like in the dead of summer in stop and go bumper to bumper traffic? At 190, in the winter, I just bet will equate to 210 in the summer, all else being equal. That's not giving yourself much cushion.