Back in the day carter made a three barrel AFB carburetor I think for pontiac that I thought was around 900 cfm. Look up "three barrel carter afb" kinda cool looking carbs!
Yup! Holley and Carter made a 3bbl. carb for NASCAR. I heard from a few that the Holley's were hard for a street tune/drivability but sang like heck on the track at WOT.
I never met anyone with a Carter version. Maybe one day I'll make my own.
I heard or read some scuttlebutt many years ago that Carters were rated their 4bbls differently than how every body else rated theirs. Anyone else hear that?