[Greg Jones]

Are you certain it is seepage from the head gasket joint? If at the front of the engine, could overflow from the radiator be picked up by the fan and depositing it at the front of the engine? I just went through that on my rebuilt engine, and thought I had a leak until I realized I had overfilled the radiator and it was "seeking its own level." Coolant was being expunged from the overflow pipe, getting picked up by the fan, deposited at the front of the engine, and dribbling down the front of the block. It looked like a leak at the front head gasket joint but fortunately was not. Just a thought.... And the fact that I drive real fast probably kept the coolant from just dropping straight to the ground.