Shelby's never had a rear decklid pedestal spoiler like your '05. They had absolutely nothing there in 65-66, and in 67-70 they had a ducktail. So there's really no analogy between "Shelby-inspired" style and the spoiler on your '05. Don't worry, your spoiler looks great. Just many of us here like the purer less-cluttered basic form. Have fun!!!!!
First of all....you can not compare the very well worn out 5.0....how tired is that....to the '05 Stang. The 5.0 crew is sooooo over with here. Just looks like you are trying too hard here where I live. :