The dyno numbers I've seen on the 2nd Gen LS V8 indicate that the 280hp figure is pretty darn close to right on the money, and the MKS's D37 was almost certainly dyno'd on the same dynos. And 280hp is still greater than 270hp.
When the 3.5TF goes into the MKS and the D37 is up-rated to match, then we can talk about the MKS having more power. When the MKS is launched next summer, it will NOT have more power than a 2nd Gen LS V8.
Darn close? Right on the money?
Yeah right, have you seen the dyno sheets? They are no where near 280, lets try your research again.
http://www.lincolnvscadillac.com/showthread.php?t=36720