Anyone have a resource for AC duct - 72 Olds Cutlass and missing the driver vent duct? I tried Rock Auto and some of the other similar places and wasn't able to find it.

 

None of our parts are available aftermarket. Post a parts wanted ad on here - several of the guys have collections of them.

The plastic parts are still easy to find. All of the fabric square ducts are falling apart due to age. I take one, clean it up, trim the ends to a clean edge, then wrap tightly with mylar A/C duct tape.

There are some adapters to go from the common round duct to our rectangle vent connections from some small specialty houses, but they're tough to find and I never figured out the right sizes.

 

I have some A/C ducts listed for sale.
https://classicoldsmobile.com/forums...t-hose-142664/

 

The Vintage Air Kits come with adapters that take the dash rectangular ducts and change them to round. You would need to figure out a way to do it at both ends as the original air box under the dash is rectangular as well - the Vintage air box outlets are round. You can buy the round hoses at just about any parts store. The problem with the old rectangular hoses is that they are extremely brittle and usually filthy. All you can really do with them is gently try to dust them off. I tried to clean one once with a damp rag and it just disintegrated. Good luck.