Do a compression test and report back on what the cranking compression is.
Without knowing exact combustion chamber cc the heads are and what piston dish if any your just throwing darts at a wall guessing the compression ratio. Maybe those radiator baffles help maybe they don't. I drive my car here in AZ when its 100+ out and it never goes over 180 degrees coolant temp. what are you looking for in your bird? performance, cruise to anywhere car?
