Summer Water Temp Baseline?

That’s just dumb. There are all kinds of cooling problems that can’t be solved by upgrading the radiator. And that doesn’t even address the possibility that a $450 custom aluminum radiator isn’t necessarily an upgrade.

It was a general statement and the advice given to me by slantsixdan.

I'll be more specific,

"....assuming the cooling system: water pump, water passages, thermostat, and fan are in good working order"

a custom radiator solves all early, shroud-less slant six cooling problems

Better?