Whatever you do, don't use "Extended Life" coolant, which is intended for certain GM cars. I put some once in my 1996 Plymouth after a good flush. I don't recall it said "Dexcool", probably because of a branding thing. Wags term it "Death Cool". Seems it reacts over time with leftover green coolant to form brown solids. Years later, I found such floating at the top of the radiator and eventually clogged it to run hot, which a radiator back-flush fixed. I also got a lot of rusty water from the flush, so might be "bad chemistry" (fight between acids).

That is the only car I don't now have Evans Waterless Coolant. Waterless should be good for life with no corrosion worries. You might roll-your-own by mixing pure proplyene glycol (Sierra brand) with ethylene glycol (regular green stuff). I've driven one of my 300D's up the I-5 grade at 65 mph over the Tehachapi Mountains north of L.A. on a 105 F day and the dash gage never exceeded 90 C, so good-enough (some factory designs are validated there). With no corrosion, it should never get worse. Studying all the other coolants out there today can be confusing.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans