Radiator suggestions

. I'm about 25-30 minutes from anywhere, would like the ability to cruise to a cruise night and play a bit, in the heat
IMHO you have some other issue going on. You currently have plenty of fan and radiator.

ARE YOU SURE your temperature reading is correct?

I'm not a fan of shrouds that are parallel to the radiator core ( I don't want to get into it, again) but yours is very far away from the rad so you should not have any issues.

IMHO if the factory could cool a 383 or 440 in a dart with a 22" 2 core ( might have been 3 core???) radiator than you should be able to also.

You either have a bad water pump, bad thermostat, or your pulley ratio is way out of wack.

Or you have blocked passages, clogged radiator, head gasket leak, or some other mechanical issue.

What is the diameter of your wp pulley?
What is the diameter of your crank pulley?