[Excaliber]

Thats a great question Brent, seems to me the Webers were for better throttle response UP TO a certain rpm range. If I recall the Cobra history correctly a single four barrel was the favored set up when it came to absolute horse power. Even the GT40 was equipped, at some point, with dual fours in search of more horse power. I'm not clear on what the final carb solution was for the race however.