I just checked and I dont have the foam piece on the spline.
I think I might have thrown it out when I did the heater bypass. Good thing is that I insulated my black plastic duct with foil insulation when I did the bypass. This is the black dryer vent like tube that goes into the ducts.
It looks like this is the area that we want to keep cool since if the duct intake tube gets hot it transfers the heat into the ducts. Guess My ac problem wasn't that bad since the tube was insulated, but now I an going to insulate the whole area.
Michael, what is the foil that you got,and where do you get it- Home Depot-Lowes, or at an AC supply house?