I hear ya, I would still pressure check the cooling system. It could be a hydraulic pump leaking into the crankcase, or the P/S pump.

Usually (every time in my experience of 30 years) when a continental flat head has a faulty head gasket, there is a compression loss in 1 or 2 cylinders. I've never had a coolant leak into the crankcase, but there's always a first.