Heater core re-cored? Or such thing as a universal one?

RustyRatRod said
What model is that thing? A Charger?

The shell (firewall and heater box) is technically a 78 monaco 2 door. With A/C

I usually look up 78 Cordoba or charger, as some parts searches incorrectly pull the "Royal Monaco" which was a C body.