Evans coolant is used by lots of collector car owners. By collector cars, I mean 100 year old vehicles and brass era cars. A collector here in Atlanta uses it in certain vehicles with unusual cooling systems or cars with various types of metal parts in the system to prevent corrosion. Jay Leno swears by it for certain cars in his collection. It's expensive but it works.
I don't think a Chevy inline 6 would necessarily have to use it but it isn't going to hurt anything. It's hot as Hades here in Atlanta and my vehicles use regular Ethylene Glycol without overheating.
To use Evans, you must prepare the system properly. There can be NO WATER or COOLANT remaining in the system at all. Every drop must be removed. That pretty much means an engine tear down.
