So looks like I have to replace my heater core

I just removed my heater box on my 70 dart yesterday. I left the A/C part of the box in the dash. You don't have to remove the whole thing. And you also don't need to remove the dash. BUT I did tear my glovebox out(I have a new one). It was my first-time doing so. And it took me about an hour taking my time in my apartment parking lot. Just make sure and blow all of the water out of the heater core so it doesn't pour all over the interior. Take lots of pictures so you can replace the vacuum lines and control cables back on properly. If you do have an A/C car and need some help. Send me a PM.