I dont expect to see many faster times stock. The 3.91 gears are offset by the revised gearing in the trans making it the same overall as an SS with the 3.45.
The tires are not as sticky as I would have expected. Track prep was poor, and they are awesome in a steady state corner but don't appear to like the shock of a drag launch and then spin.
I wounlt buy it if you are looking for a drag car only, but looking at your Dyno numbers in your sig the 13s seem to be putting out higher numbers stock.