Smallest 4 bbl, specifically spread bore?

[Mallory]

Im thinking of a 4 Bbl manifold for my 2,8. But I don't want to over carburate it. What is the smallest
( in CFM) 4 Bbl?
I thought of a Rochester to keep with the car's GM blood, but I think a spread bore Holley will work better. Is a 650 the smallest spread bore made?

[Drop Top Olds]

smallest one I see on the Holley catalog

https://www.holley.com/products/fuel...y/parts/0-8007

[newmexguy]

Darn those holley carbs have got expensive. Remember buying brand new #1850's vac. secondary out of summit catalogs 30 years ago for $99.

[Century7667]

Holley made a 390 CFM carb that was used on a lot of 6 cyl. applications. Worked nicely on 4.1 ( 250 CID) Chevy Inline 6. I think it had vacuum secondaries as well.

Ken T.