360 head gasket blocked ports???

Another member posted this when he posted about 360 head gaskets. The water/coolant is to flow into the block, straight through past the cylinders to the back and then up through the cylinder heads back to the radiator through the top hose. If the holes were open, the cooling wouldn't be as efficient , coolant would bypass going all through the block and just go up the front through the heads and out the top hose leaving the rest to heat soak/overheat