Well my estimation came from Consumerguide.com. And it was probably for the standard Taurus. So my bad! But apparently in your research you didn't find any numbers, or Consumerguide.com's weren't that bad. Because you didn't post any.
According to www.edmunds.com
the '06 stang with a V6 weighs in at 3373.
And a '99 SHO weighs in at 3353.
Edmunds says the '97 SHO does 0-60 in 6.5. So the '97 is the way to go. But it also weighs less, 3326. Couldn't be possible weight has nothing to do with HP. That's crazy.