All of the Chrysler trunk weatherstrip was "roll goods", meaning sold "by the foot", basically. No molded right-angle corners. In the Steele catalog, there should be a section on "roll goods", so you can compare what's in the catalog with what's on your car. Check the shape and cross section of what's on the car and what they have in the catalog.
If you're unsure, be sure to read their "Return Policy". I suspect that if you only unpack it to compare and don't install it, you can return the unharmed weatherstrip for a refund (your shipping cost, I suspect). For good measure, you might order it "over the phone" rather than online, just to be sure.
ONE thing to check, if you unpackage it, is the length of what they're selling. Ideally, there should be more in their "cut-length" than what you actually need. This way, you can make a better "end cut" on the car.
Perhaps others have some comments, too?
CBODY67