Windshield locking strip on 70 swinger?

Do I need a locking strip for my 70 Dart? I thought I was good to go with the weatherstripping only and then I saw that some of these A's require locking strips...deng...If so, front and rear, or just one?

Will this guy work out?

http://www.classicindustries.com/mopar/parts/ma9808.html#.UY_T1LWsh8E