vent boxes

I removed the dash to solve a rust problem, so everything is open. I removed the air or vent box to gain access to the cowl area to clean it out. There is a thick gasket between the cowl and the air box. Mine was very hard and fell into pieces when I removed it. Where could I find this piece and what would I ask for? Also the thin insulation that seals the doors has dried up and very brittle. What would be best to replace this?
As always, Thanks for your help.
I had surgery on my right arm and am trying to got back to work on the 65 barracuda.
Author: admin