"Obviously it was a publicity stunt" Why? The LS series engines are now much more popular than the original Gen 1 sbcs' and make a ton of horsepower AND, being Chevys, everybody and their brother make speed parts for them, which accordingly, makes them cheaper and more available. I'm a Mopar guy, but you can't argue with success and bang for the buck. For what it's worth, there's a few LS powered Mustangs out there and the Ford purists all fall down in slathering fits when they see them. Different strokes........