[Lynn Eades]

You appear to be the first person in this thread to mention "over heating" Ford v8's are real prone to flooding when hot.
Vapour lock is separate problem. When you have a column of petrol sitting between the fuel pump valve and the needle valve, and its hot in the engine bay, the fuel tries to expand.
If the needle valve wont hold it, or the float level is a bit on the high side, then petrol piddles down into the manifold, and floods the engine.
I believe Barry is trying to find out how best to clear it. or to get it started from an "engine flooded" situation.