Found my dads original 1971 duster!

Place a towel at the base of the wiper on the cowl. Get a small piece of wood and a small pry bar or a screwdriver. flat head. Pry up with one hand and hold on to the wiper with the other. It should start to come up off the pedestal. Install. with wipers off the car. Turn the wipers on then turn them off. When they are in the off position they are down. Install wiper.