to much to quote here
ill see if i can enlighten some, and not others
i doubt we'll see a mustang cobra R before MY 08, and mustang hasnt had a turbocharged engine since the early 80's running a 4 banger @160hp. turbos are cool, but not as cool as muscle (sry grand national fans). As far as competing with the corvette. save for the 2000 cobra R, mustang has stayed far away from competing in the corners with the vette,b ut in a straight line its always the goal for bang for the buck. but the svt will only end up competing with the standard, and more expensive C6. the upcoming MY06 Zed series vette will be prancing around with a 500hp motor to compete with the viper, and possibly Ford GT. its pricing will be similar to that of the current 500 cubed viper.
I have a sneaking suspicion that the v10 ford developed for the Shelby concept may yet see the light of day as a GM/Ferarri/Lambo/porsche stomper next step ... at least i hope... i wonder if its 6.6 L engine will fit?