barracuda replacement quarters

A large percentage of replacement body panels have a dent somewhere. The larger the panel the more likely the dent. The tiny little fenders for modern cars are normally straight beacause they'll fit in a box.
The top edge of that quarter is supposed to be bend up. To pull it down with clamps and weld it makes it more rigid. A panel without surface tension is called a blooper because it makes that sound when it moves in and out. I hope that makes sense.