Here's some before/after of a late model Mustang 'tamer install on youtube. Best before results were setting it off at 3500, 11.59@120 w/ a 1.88 60'...
BEFORE
Here's the after, able to launch at 6800, 11.26@120 w/ 1.509, basically shaved .37 off their 60' with very little time spent dialing it in.
AFTER
Be sure to read the comments below the videos, I expect there's another tenth or so to be found if they look hard enough.
Grant