There's two things a person cannot escape when on a GM,Ford or Mopar site :
1st is the word "flow":-
"my head flows 600cfm", "my $2000 Berylium Alloy MagnaFlux Jnr heads with Depleted Uranium Sodium Filled Poly Angled Valves that flow 400 hp each", "etc, etc".
2nd is the bull twang power figures that defy the laws of physics. But then again who's going to admit they wasted a shipload of money on a car engine that still only gets them into grandad 12's.
Forget the heads, extractors, tunnel rams, etc just make the diff shorter for a top speed of 80mph, but a hell of a great launch vehicle at the lights.
"She gave me a look only a mother could give a child."