1972 318, coolant getting into oil

Thank you gentlemen. I believe, when this car was in California, some was running it with water in the cooling system. It's has had all the freeze plugs replaced before I got the car. To put that much coolant in the oil in less that a 1/2 hour and it ran good,I can believe I have a head gasket problem. I couldn't even get the cooling system pressure tester to pump up,so it's going to large and obvious part failure.