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I just redid my a/c heater box and heater core. If I were to do it all over again, I would go with a sure fit classic air system. Good luck!

New verses old! Everything went back together nicely. If I had to do it again I would go with a sure fit unit instead of the oem style. I will probably swap this out next year for the sure fit unit when I get the ac going again. For right now I have a new heater core and box I am good with that.

So the rod will pull out. I do doubt an original one will with all the rust. At least now I know and knowing is half the battle.

I have a busted heater core. I pulled the heater box out and it was damaged as well. So I got a new box and new heater core. I am swapping the components over, but the flap has to be out of the way to install the new heater core. I haven’t tried moving the evaporator to the new box yet. I will...

New shift boot, and air box. Now only if could figure out the flapper removal.

How do you remove the flapper to get the heater core out or in? I have a new box and don’t want to damage it, but I don’t see how to get the flapper out.

How do you remove the flapper to get the heater core out or in? I have a new box and don’t want to damage it, but I don’t see how to get the flapper out.

As for my master cylinder it ended up having an adapter on the drum brake port. I kept my original. The correct one has 1/2-20 threads on port one (drum) , 7/16-24 threads. My car has the power disc brakes and the 2” rear drum setup. The issue I ran into is no one shows the port thread sizes...

Looks like I am getting a new heater box.

It was built late 1972 . That’s what the Marti report says.

Thanks it’s more work than I was thinking. Trying to get it to a daily driver status. I want to enjoy it a little before I deep dive into the motor, drive line and bodywork .

Current update. I have replaced the following brake booster , master cylinder(took three tries to find the right one), front rotors and calipers , front brakes rubber lines, rear drums and wheel cylinders, speedometer cable, new rear leaf springs, new rear shocks, new carburetor, new gas...

Thank you everyone for the warm welcome.

Yeah, that was a first for me on the drum. Overall pretty complete. Doing basic maintenance on it to get to a daily driver status. New brakes , gas tank fuel lines, basically anything rubber is getting replaced.

This is what I am working with.

I just picked a 1973 mustang sports roof. It’s a Q code 4 speed . It has the competition suspension, power disc brakes, 3.25 open rear gears, A/C, manual steering. My plan is to get it back on the road as a daily driver.