Bar Bet Winner!!

I wouldn't trust any flowbench to come up with an exact number. All I know is that I "estimate" the cfm at 700-725 for the small one and 750-770 fot the larger one, basically there are only 2 sizes unless you find the "holy grail" of Q-jets (1 year only Pontiac ). You can tweak them a bit to get a bit more cfm. Cliff Ruggles runs high 10's to low 11's (depending on the tune) in a Pontiac ventura with a real Pontiac motor (455 over). Just a great carb and you can find them for next to nothing. I have one on my 318, very adaptable! Mine is off a 85 dodge van w 360.