What kind of coolant should I use?

1987 Ford Econoline E-250 conversion van.
I live in Florida and it easily gets over 100 degrees F in summer. I have never done a coolant flush/change, but it seems pretty easy. What coolant would be best to use on this vehicle?

Added (1). BTW: I this van has not been driven in years, so everything needs to be changed.

Standard coolant, ethylene glycol.

You 1987 Ford requires traditional green coolant mixed 50/50 with distilled water.

I would flush out the cooling system, especially the radiator and fill it up with 50/50 antifreeze! Myself i use 50/50 prestone antifreeze!

I recommend that a trained and certified mechanic inspect the car and do the fluid changes. Without a proper flush procedure, the old coolant shall be trapped in many places. There's a need as to hoses and belts that need to be inspected and replaced. Same with motor oil and transmission oil and brake fluid oil and power steering oil. There's specific coolant as specified in the owner's manual.

Green mixed 50/50 with water. Best to use bottled water (a gallon is cheap at the grocery store). Some Florida municipal water has too much calcium in it.

You should also change the hoses and thermostat as well. While hoses are off, and thermostat is out, flush well with a garden hose. Also flush the heater core.