American Muscle has the 6MT PP and claiming 437 whp... if true does that mean the car is underrated by Ford? That 1/4 mile time must be credited to the drag mode and tires, and possibly being underrated in power. Certainly is a competitive car now, although doesn't seem like PP took any step forward, I don't think it will outperform standard SS on a track.
Here is the link(Dyno figures at 11:11):