I've driven a V-6 mustang (briefly), and I'd have to say that it doesn't have the pull of the M103 3.0L. The 5.0 mustang, no chance whatsoever, but a V6 is definitely realistic. And if it's one of the 4-cyl ones (do they still make those?), no problem at all.

CaptAlex, you ever downshift your transmission into the "2" position? If not, that's your problem right there.