The Cougar has been without heat for quite a while now. I replaced the heater core about eight years ago, with an aluminum Chinese part from oreillys. I didn't think much about going with aluminum(vs the original brass/copper core).
Anyhow, the oreillys part only lasted less than a couple of years before it started leaking. I didn't want to deal with another heater core job, so I bypassed it, and drove without heat for a few years(the car only sees a few hundre miles annually in dry warmish weather).
Well, I found some motivation the other day, and tore into the dash. Not really a fun job, but removing the passenger seat helped ease the pain. It went back together without any issues.
I took it out for an on the road yesterday, and the heater works well for a fifty nine year old car. On a sour note, adding new antifreeze to the system somehow trigger the waterpump to start leaking at the shaft. Oh well, timing chain is due for replacement this winter...

