Go with the universal, long life coolant. It is nice, if you have a hose blow, you can through in whatever Joe Smoe's gas and bait shop has on the shelf. I have had 0 corrosion issues with aluminum intakes on iron blocks with aluminum rads, running for years.
I only use water it’s what does the cooling
Antifreeze will only raise the temperature of the waters boiling point under pressure and lower the freezing point of the water and it’s easy for the tracks employee to clean up