Best coolant for our 60-70's Mopars?

Marcohotrod said
the last time my engine overheated it was due to a leak, = low coolant , glad I was not paying $50 a gallon.

As was mentioned earlier, in the event that you do spring a leak, it will only trickle out because the system is not under pressure like with water. Hoses will not burst like with traditional coolant.