Carb size for mild 440

Good morning everyone,

I am a little out of my element here.

A friend of mine has a 67 Satellite with a motorhome 440. The engine is stock internally with the exception of a Hughes Whiplash cam, performer intake manifold. Car has 3.23 gears, tall rear tires, and stock exhaust manifolds. The car is used as a driver, road trip machine. The owner is looking at putting an new Edelbrock AVS2 carb on it. Although it is a 440 cubic inch engine I was thinking perhaps a 650 might fit the bill. I do not want to steer him in the wrong direction, am I wrong, does he need an 800? Ultimate performance is not the idea here, drivability and utility are key. Thanks guys.

While the 440 could most probably & happily use the 750, there isn’t a whole lot of power gain or rpm gain. The one reason I would move to the 750 is if he upgraded the engine.

History - An old friend of mine had a ‘66 Imperial w/a 440. The carb was a small diameter inlet AFB that also had no secondary air door above the throttle blades.
This carb is a 600 cfm unit. It never bogged or stumbled. Even when you slammed the go pedal. The secondary side would open up and just gobble down the air and fuel and the car would just GO!

If your bud wants a 90+% cruiser, I’d use the 600/650.