[olddog]

When you are at 460/420 Hp/Torque N/A, 15 psi boost is going to end up near 900/800 Hp/Torque. That's more than just about any N/A big inch push rod engine in a Cobra running on the streets. You really do not need to go that far. 5 or 10 psi boost should dirty the shorts of most of us, if 460/420 is too tame for you.

No matter how you slice it, these engines are impressive coming from Ford.

I'm with most of you, I would stay with a push rod, myself, but I do not look down on anyone going this route. Shelby would have used any technology available to go faster. He wasn't hung up on engine families.