The goodmark full quarters are stamped much better than the skins. Just installed a pair, only issue I had with them was the trunk lid gap with was an easy fix... very little work otherwise to get straight.
Anymore I prefer to replace the full panel. If its rusted on the lower area, may not be long before it starts to bubble around the wheel well.
68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
99 Trans Am, 66 GTO, 06 Magnum RT AWD