Opened up my heater-a/c box today.
As expected, the heater core was toast, and a small leak in the evaporator.

All the duct and door seal foam has crumbled and is/has fallen away.

Is there a service kit with new seals.
Or a source for adhesive backed foam to cut my own?

 

Look for window seals. Home Depot sells it

 

Here’s an assortment of images from earlier today.
Most are self explanatory.

The fan is working just fine... but I’ve seen enough posts on this site to know that they and the resistor (mine has surfaced corrosion on the terminals) do fail... with 200K+ on the clock, should I replace them while I’m in there, or is the risk of an aftermarket replacement failing in short order greater than the original failing?

The last image is one of the mounting studs.
The shop that replaced the heater core some 10 years ago must have lost one, as I’m one short.
Anyone have a spare laying around?
I’d be happy to pay shipping and contribute to your beer fund.

 

Will that hold up to the heat a cab see’s during summer?

 

It should as I believe that is what Dodge used. We used that stuff at the dealership

 

But it's the same as the old stuff! Do an upgrade and get closed cell sponge rubber.