Help please 74 Duster windshield locking strip

When I purchase my new windshield gasket for my 2 door 360 Duster do I need to purchase a locking strip.
Can the gasket be used without a locking strip
Yes. No....
I think all the front glass gaskets use a lock strip which is a round cord. The bottom edge just zips closed in center up to several inches from the corner and the lock strip goes the rest of the way. If it's that style gasket, it will not work without it. My back gasket also used a lock strip, but not all do. I helped do a 74 Dart (not Sport) and it did not use one in back.