I just checked again, and the Superbird has the 426 instead of the 440 (both engines were available in the real car). I don't know what the top speed on the 426 version was. It may be accurate at 120. :-(
What _still_ amazes me about driving the big-block Cougar is that the darn thing has great handling! FE engines aren't light by any measure, and the Cougar is one of those light-rear-end pony cars. I was expecting the dictionary definition of "understeer", but the nose goes around corners very nicely. It's a lot of fun to drive.
That said, I'd have to say that the street car I like driving best is the Ford GT. Except, the first time (and second time, and so on) I drove it, I couldn't understand why the handling was so slippery. It's supposed to be a SUPERcar! Why wouldn't it stay on the road?!?
Um, after a couple more times "introducing myself" to the guardrails, I realized I was entering corners almost twice as fast as with the Mustang GT or Nismo 400 (yet -another- Skyline ;-)). If the real car is this smooth, I'm definitely going to have to figure out which family member to sell to get one. :-D