Best coolant for our 60-70's Mopars?

The only downside to this water less stuff is if you have a failure you can't put water in or you ruin the stuff and the coolant system has to be as close to water free when you add it [great for new builds] i thought about using it with a new build but it's not cost effective for me.

If you watch all of that Jay Leno video that I posted you'll see that it can still be saved after you've added water. It would be a b#tch to do though because you have to boil out the water.