My old Cougar had so much bodywork that needed done i decided to put my engine in a car with no body damage. The engine had run great in the old car. But, last year we had a week of cold weather, which we hardly ever get, and the freeze plugs blew out. Now that I've started it up it runs great, but is blowing oil out of the PCV valves, and there seems to be some water in the oil. There was a little white foam on the dipstick. It seems like it has excessive crank case pressure. Don't know if it's blown a head gasket, cracked the heads or the block, or a water jacket somewhere. Any ideas? Is it worth trying replacing just the head gaskets first since the engine isn't missing? Motor seems to run great, except for the oil spewing out of the breather.