Heater Assembly Gaskets/Seals

[cshanek]

Greetings ...

I am in the process of replacing my 1964 C20 Heater Blower Motor, and Heater Core (Deluxe). I ordered the standard seal/gasket kit from class parts (https://classicparts.com/1963-66-heater-gasket-set?), which appears to match what is sold on LMC, and I could really only figure out the location for 2 of the gaskets. I dug around the web and couldn't find any help. I did buy a tube of high-heat gasket maker, so that is an option. I also spent a good deal of time scraping/sanding off the remnants of the previous (liquid) gasket. Questions ...

1. What parts of the heater assembly actually require a gasket/seal? I currently have the thin, rectangular-ish gasket toward the top of the assembly, and the gasket in the cab that goes around the heat duct.
2. If I need to seal between the lid, heater motor, or air box, how do you feel about using the liquid gasket stuff?
3. Are those other gaskets I have (see photos) for another assembly/variant or I am missing something obvious?

Thanks in advance for info/pointers.

-Shane