Dumb Question.

kt340sport said

I had a 70 Charger R/T S/E 440, did not have one .I had to make sure i left it down few inchs on rad , or put antifreeze on the ground.

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Leaving the coolant down a few inches is where it is suppose to be.
This leaves room for expansion. If you keep filling the radiator to the top without a coolant recovery system,it will continue to puke every time.
Some people fill it to the top,let it puke,and there's your level.