Should I buy the OEM ford part I found it for $45. Autozone has one which is made by transpro for $28. Napa has one for $23. I just don't want to do this job more than once.
Remember, by trashing the heater core you also lose the defroster. Something to think about. If you choose to do it, I would buy the Ford piece. "After the thrill of the low price is gone..."
I'd go get the closest parts store one. Carquest in my case mostly. I have had a Ford unit fail in all 3 of my Foxes. And one aftermarket unit. Does not seem to matter, I think the tube and core size, combined with a hot/cold environment, vibration and chemicals just kills the little suckers.