Thank you Dan. Only had truck a month and drove 4 miles today ( longest drive since I got it. ) I had water coming onto floor from behind the heater. My first thought was a bad heater core , but when I looked under hood , bothe heater hoses wear same size, 1 inch outside diameter, Making me wonder if they were suppose to be two sizes like on 60s models and maybe the new hoses Precious owner may have just crimped down the new hoses onto the heater connection and the longer drive increase heat and pressure and the connection failed. Other heater core leaks I’ve had on other taskforce teucks were small and leaked out of heater housing. Guess I’ll pull it out and investigate. Probably had half gallon pour out while truck was idling b4 turning off. No leak while just sitting.