My second 1965 Dodge Dart.
Not opened the heater box yet, but when I peek into the hole where the air goes in, it is full of leaves, straws, and whatever else garbage it can be. So, if for nothing else it will look good when I get it cleaned. Looking forward to that part.
And when having it out and open I will check the heater core to see if it is leaking or if it is good and can go back in. I refuse to put some aluminum thing in there.