Best coolant for our 60-70's Mopars?

is there better? certainly! But NOBODY can argue these facts: Most cars have aluminum radiators for the past 25 years. Many of these cars have aluminum heads. Most cars anti-freeze systems are neglected. Most of these same cars have anywhere between 150 - 200 thousand miles on them, some even much more. Moparman318, go to Walmart and buy Prestone anti-freeze 50/50. If your radiator is good, fan working properly, and thermostat working properly you will not have a problem (providing your block doesn't have 40 + years of sludge)