Parts interchange between 1965 LeMans and big car?
 

Do any firewall / underdash parts interchange between big cars and LeMans?
I have a few misc parts that I stripped out of a 1964 Catalina and before I get rid of them I wanted to make sure they are not the same as my 1965 LeMans.

The parts I am referring to are the heater assembly, accelerator pedal parts, park brake pieces, defrost duct at dash, fresh air cables.
The only part numbers I have at the moment are for one of the plastic heater box outlets, p/n 543892, and two vacuum diaphragms, p/n 3143146 and 3144212.

Unfortunately, I can't just compare most of this stuff to my LeMans because it has had a hard life of people using whatever parts happened to be around just to keep things functioning.

Thanks in advance.

I believe that info should be in the MPC (Master Parts Catalog). I don’t have one. They sometimes come up on EBay. Maybe someone else who has one will chime in.
Just checked eBay: https://www.ebay.com/itm/39804260195...Bk9SR8SjqPrdZw