I just did this, those clips are a pain in the ass. I used vice grips and pb blaster on the clips. The brackets on the bottom of the fender at the front and rear, the brackets were about shot, so I used a grinder and a cut off wheel to disconnect. Also you'll have to soak the three #3 phillips screws with penetrant to get them to even think about budging. I didn't have an impact wrench, but it would have been handy. They were tough.
Any questions pm me.
john