DavePro

You think you've got a disaster now? Wait till you've run the car without coolant for seconds, let alone minutes. Parts of the head will reach over temp in no time and you'll need a new one. If not a new engine. Please don't ruin your engine trying to save yourself a bit of time or money.
My '55 TF dumped all its coolant on a track once when it popped a frost plug, and a few hundred metres was enough to cost me $NZ6,000. And they're cast iron.