Come on Neal, you are slipping. There is only a clip on the front of a 70 rocker panel moulding. The rear will have a single phillips head screw visible on the face of the moulding. Once you have the one screw and the one nut off the clip place the palm of your hands on the top lip of the moulding and gently push down on the moulding. That will release the lower edge of the moulding from the plastic clips. With the lower edge released pull it a little away from the body and then push upward to release the top edge. One additional word of advice, before you try to remove the moulding take a look over the entire length of the moulding as you may find additional screws holding it on. This is a common way that Backyard Bob used to hold the moulding on when they could not figure out the proper way to reattach it.
Randy Goodling
CCOA #95