It's always better to ask what may seem like a dumb question,than to go ahead and cut the car,scrap the old parts,and then find out when you get the replacement rear quarterpanel,that this part is not included with it,and feel dumb. Atleast they make the trough peices if this were the case,so the car could be repaired. I wouldn't want to have scrapped the part with the numbers on it. I have bought a few cars years back that people cut sections off them,thinking that the replacement panels were like OEM panels,only to find that the panels that were available would not cover the whole area they cut out. Thanks to AMD,that is not an issue for most popular models anymore. One was a 70 GTX,that the guy cut the whole rear clip off,only to find that the parts weren't available to repair it. On any GTX you would want to retain all the stampings.