Steele Rubber Rant.. I am PO'd big time

I did the same on a 72 Swinger. But I reused the old seal. I cleaned the pinchweld due to rust and painted it. I installed the same window and gasket I took out and it was loose. WTF!
Turns out there was foam seal (filler) that I had removed from the pinchweld during clean up.
I got a thin closed cell foam weatherstripping at the local Home Depot put it on the pinchweld and slimed it up with windshield sealent before installing the rubber and glass again. Worked like a champ.
I have a 71 Swinger here with the back glass out of it. I'm sure that ribbon seal is still on there. If you like I can get you a picture in the morning to show what I'm talking about..