Well, you might be the exception but I find it hard to believe others wouldn't consider an Ecoboost V6. With aftermarket support, it would be capable of more torque and similar HP as a full bolt on naturally aspirated v8.
Edit: this post was in response to germeezy1
I personally could care less because quite simply it isn't a V8, and to me part of the Mustang experience is the sounds, and feel of a V8 engine.