rattle under dash on my 72 lemans

[Journeyrick]

i hear something lose under glove box area on my 72 lemans / heater core ?

 

[melsg5]

If you have AC, drop the duct and then look underneath.

 

[cammerjeff]

I doubt it is the heater core, but there are alot of small parts and plastic duct work that can come loose after 50+ years. You will just have to start looking around, and may have to pull out the glove compartment to find it. Good luck!