New trunk seal, now I can't close the trunk

The L< profile is correct for the typical A-body. A 75 Valiant Brougham had the same. The Duster aint typical body wise.
And this seal will look like a simple rectangle strip of rubber when the < collapses. It wasn't a long life design. That's why I went for something different.
Going a little off track here to share a memory... During my childhood I saw quite a few trunk seals torn up on all sorts of vehicles. One item seemed to be a trunk seals worst enemy. That was the push mower body.