I have heard those who are in the business say they can flow OVER 1200cfm with a "4150" style carb as Mark W has shown. It can bolt to a 4150 or 4500 intake. It is a "4150" carb as it WILL bolt up to a 4150 intake..

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"