Anyone know what this package looks like? It appears to only be available on the V6.

 

No it's available on the GT too.
Just go to
Fordvehicles.com and build your Mustang with that as an option, you'll see what it looks like on your car in 4-5 angles (most of the angles aren't very good however, one of them is like a high angle pic of the car like if you were standing on the roof of a house....LOL )

 

Like this

 

Those are the stripes for the 2010.
the 2011 hood/side stripes are a bit different.

And those white stripes on the blue car don't look great, black would look better.