401 Nailhead carb ?'s

I need a new carb for my nailhead, the one that came with the car is pretty bad. I'm thinking About a new Edelbrock, since they carry them at the Local parts stores and Jets and Needles are easy to get at the same places. Anyway, how much carb am I looking for CFM wise?

I was thinking a 650 should be enough (More than enough according to Edelbrock's charts)

Opinions?

 

I've got a 650 Edelbrock on my 425. I've heard that the best to run is 2 500's or a single 850. Nailheads like to breathe.

 

I have a 750 on a 401 and just jet down the primarys for gas mileage. and let it breathe they will take as much as you can get in.

 

if they have the 750 get it, but she'll run fine with the 650....

 

The 750 is a little more. I think that's what I'm going with. I'd love dual quads, but that's 2 carbs, a manifold and more pain in the ass with the Dynaflow linkage. I'm sure it would also hurt a bit more at the pump.

 

Hey no one said it would be cheap to drive a cool ride! lol