"If a mini van from 2003/2004 beats a Porsche from 1955, will a 2005 Mustang beat a 25-30 year old Porsche?"
-Heck yeah! My 89 Civic hatch was better than the 70T in many regards. Modern fuel/spark systems will do that.
The new 'stang doesn't look bad, and your drawings definitly have merit and stay in the lines of the concept. You can buy 3-4 for the price of a new Carrera.
All I want to know is: what are those rear grill vents for

?