Magnum engine misshapes..,

Hope ist not the head or head gasket. I'll will say that I over heated my Durango real bad one winter. Twenty something below and I just started it and drove to get home without warming it up at all. Thermostat stuck and I pegged the gauge and kept driving, it was too cold to stop. Didn't even replace the thermostat and never had any problems after that. Kept the engine and sent it to the crusher with 300K.