The "real" Cobra R wing from Ford Racing will not bolt up directly. Two holes will show. I filled my lid and and painted it. With hind-site, I will suggest that you just get a V6 lid with no holes. You might be able to get one cheap at a junk yard. Don't worry about the lid supporting the wing; Ford includes some big thick filler pieces that will reinforce the area around the holes. There is no problem with the wing at all. It installs easily. Just be CAREFUL drilling the holes! Go SLOOOOOOOW. Ford also sends you the wing that is ready to paint (barring any shipping damage).
I LOVE my Cobra R wing! It is actually functional and helps to keep the rear down around corners.