See the chebby guys like to ride the fence by putting their engines in Ford bodies.
In truth they would rather be Ford guys, but then they would have to back track on all of the trash talk they said about Fords.
Also, its about the lack of brand loyalty. The younger guys don't give a hoot about one brand vs another and I have seen quite a few Fox Mustangs with chebby engines, where as a good 351w would run just as good if not better.
These guys I like to call the Ford Posers. As they pretend to be Ford guys as in owning a Mustang, but then put there shit engines between the shock towers.