Quote:
Originally Posted by Diamond_Don
Here's a picture from my 1970 big block Harrison radiator if it helps.
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Thanks for your picture, Are you somewhat positive that's the original drain valve? I have 2 1970 L78 camaros both have the same forward facing valve tabs correct for a 1970. But one has the barrel flutted drain like yours and the other is without the barrel drain. Most likely there may have been different vendors for the valves. That one of the answers I'm trying to sort out. Also if they were painted. I feel they were installed when the radiator was installed in the car. So no paint should applied when properly restored. Also paint will prevent it from turning on the threads to open properly. GM always protected parts to prevent a service problems.