There used to be an 860 CFM 2 BBL that is rate, almost bought one once. There is a 500 CFM that says 800 CFM down the leg. Do not know what down the leg means.

Thought maybe a person could get a special made 2 BBL 800 C

NOWHERE. Holley makes only three two barrel carburetors. One 350 CFM and two 500 CFM's

Yep - The largest is the # 4412 at 500 cfm for the Dodge 440 Six Pac. Now, they make an 800 'three' barrel...

HI, I think there's a carb called the preditor (SP). its like a one big hole with a butterfly and it flows like 600 cfm TO like 1200 cfm. its a big squaire ugly thing .. But I don't think you can get a 2bl. intake flow 800 cfm's anyway.

good luck

tim

You cant ever buy a 800cfm 2bbl holley because they never made one 500cfm is the largest 2bbl they make.

there is one that flows about 600 or so, but they are very hard to find, and getting rare.