Best bet is to badge it as a v6 and keep quiet no kidding. The gt of 2010 makes as much as the 2011 v6 AND everyone thinks it's a 5.0 so honestly you need v6 badges....
2006 Lime Green Mustang GT
-Rebuilt at .020 over (stock compression)
-NSR Comp stage 2 cams
-BBK 62mm TB
-High flow catted X
All mods are questionable- bought "built"