I've been messing around with several cars in my time, But I'm having trouble removing the wiper arms from my 80 El camino. Without permenant damaging them how do I remove each arm? I tried flipping that small clip and pulling , with no luck. do I need a puller or what. Some qiuck help would be great. Also while you are at it if you have a set of Wiper Arms for sale let me know.