You guys are proving my point!
Stan, -I tend to believe the cowl stops where the dashboard begins.
Brian- I believe the cowl goes back to the forward edge of the front door
John Romero-Defining where the cowl ends is tough but I think everyone would agree that from the base of the windshield and rearward is no longer the cowl.
I think that if the cowl is going to be used as a definitive ending point for streamlining, then there should be a clear definition of cowl.
I also believe it it is wrong to impose the definition of an un-blown hood scoop on a blown car. On an un-blown car, the scoop is only used for scavenging air, and aero dynamics, so the 11" height seems reasonable.
On a blown car, the scoop often times also covers a blower sticking through the hood. It seems to me, that the same 11" height requirement is arbitrary and restrictive.
So, even if we modify the hood scoop to comply with the aero mods allowed, ''streamlining ahead of and including the cowl'', we could be challenged in impound and lose.
Why? Because where the cowl ends is interpreted differently by everybody!