Early Rear Valance Removal

The one on my 65 Barracuda is killed about as bad as yours is. I'm hoping to be able to bang a lot of it back out, and maybe use a C clamp or something to mash some of the ones right behind my tag back out. I've even considered buying some of those glue on attachments for dent pullers like the paintless dent removal guys use. I'm not too squeamish about cutting something apart to fix it, but just don't want to take mine off for some reason...lol.