It would perform too close to or beat the NA 5.0
When you have 3 different levels of performance they all need to stand on their own and not compete with each other.
What I don't get is why everyone is saying how cool it would be if ford put a 3.5 EB in a mustang. How about a 5.0 with rear drive in an SHO? I know that's a stretch but one could dream.