1970 dart swinger tail stripe, help needed

The one I put on from Phoenix graphics is "boomarang" across the trunk lid. If you were to paint it on you would do the same thing. The shape follows the shape of the rear of the trunk lid.

View attachment 1715697759
You will love this, because the trunk lid has a faint bend in the center, and the designers wanted the stripe to look like it was straight across when viewed from the back of the car, they put that shallow bend in the stripe. Give it a try, stand behind the car and take a look and... damned if it doesn't look straight. Clever fellows, those factory guys!!!