Ill see if I can find a pic of my old sixes it had the 99-00 spoiler on it. I think it looked good. I was thing about getting another to make a custom one but I just picked up a 281 today.
Not hard to do at all. Just line it up and drill 4 holes. Use plugs in the stock holes, or fill, sand and repaint the trunk prior to intalling the new wing. The thing that got me is the 99-04 trunk is flatter than the 94-98, so the newer wings don't sit exactly flush until you really torque them down.