I'm going to install my first headliner 1965 Dart

Pretty easy to do you got it man!, I actually took a headliner off a car at the junk yard but it on my dart same color to. best 14 bucks invested, your going to need some 3m sprayed adhesive glue for the head liner starting from the front spray some adhesive get the headliner stuck on the teeth, going bow by bow to the rear keep it nice and tight, then in the end you have the plastic trim around the window to finish it up nicely, make sure to insulate the roof I use some insulatotion that was styrofoam from Home Depot cost 8 bucks you can use it to insulate two abodies.