start at the back. i used a peice of wood and a hammer. hit the bottom edge and work your way towards the front of the car. not really hard to do just go slow and easy. should snap off. installing it is a bit harder. DONT use anything but the palm of your hand or youll dent it........dont ask
I just took the trim off of my dart the other day, What worked the best was a really old bottle opener. It just happened to fit perfect with the lip and bend of the metal, just put a little tape on it and in about 5 min had all the trim off w/o and bends or scratches. A buddy of mine show me this, sounds weird but it works. It was on a 75 dart, not sure if it is different on 65.