Best coolant for our 60-70's Mopars?

it isn't the answer all for all older cars.

Yeah, it really is.

It is interesting that Evans says that the cooling system will operate at a higher temperature but they really can't tell how much. I don't need my engine to run any hotter than it does

The engine runs cooler. The coolant is hotter. Don't just skim and assume and guess; read and learn and understand.

The Evans coolant boils (or doesn't boil) until it reaches high temps

What's this supposed to mean? The Evans coolant has a much higher boiling point than water or other coolants.

and because of the lack of water, it doesn't corrode metal parts especially aluminum and the corrosion caused by dissimilar metals. That's a good thing but that's why anti corrosive chemicals are added to ethylene glycol based coolants.

Corrosion inhibitors inhibit (reduce) corrosion, but they don't eliminate it.

The Evans coolant is touted as a "Lifetime" coolant but a lifetime hasn't been tested yet and when it first was introduced it was recommended that it was replaced every 5 years

...and over the years it's been on the market, large amounts of real world experience have been gained, forming a solid basis for extending the cautious original 5-year recommendation.

Any chemical will get contaminated especially inside a engine with heat cycles and combustion gasses entering the system.

Heat cycles do not contaminate coolant. That is not a possible thing. And if you've got combustion gases entering your cooling system, it don't matter what fluid's in your cooling system 'cause your motor's broke.

I still have the original coolant in my 02 PT Cruiser. It still tests to -34° and is clean as a whistle.

Conventional coolant doesn't lose its freeze/boil protection, it loses its corrosion inhibitors.

The next time I get to the storage garage I will test the system for voltage (electrolysis)

Good luck.

Guys, I respect you and your opinions

It doesn't look like it. If you did, you'd make an argument based on facts and reality, not guesses and assumptions. That's not very respectful at all. And that, by the way, is why I'm busting your chops. It doesn't make any nevermind to me if people do or don't buy Evans or any other kind of coolant. My grandfather used to say "You are entitled to an opinion; you are not entitled to an uninformed opinion". I think he was right about that. I have no difficulty respecting someone else's opinion, even if I don't share it, if it's based on facts and reality. If it's based on guesses and assumptions and misunderstandings and willful lack of knowledge...nope, I can't find anything in that to respect.