Six Pack question

I have a 68 Dart with a stroker 340. Exploring the idea of adding a Six Pack to it. Currently have a 750 Holley. Getting 13 MPG around town driving normal using 3.21 gears and a 4 speed. Does the center carb on a Six Pack get better, worst or the same as a double pumper? Also have a 55 chevy with a Tri-Power, 3 2G Rochesters, and a 55 Ford with 3 Holleys. I gained 5 mpg on each going from a Holley 650.

Appreciate any advice offered View attachment 1715927047

It was an answer to the OP if you read what was asked. And your snarky harley reply, yeah whatever. Your car isn't the subject here. Your feelings get hurt? Jeez..

He has a dual plane on it currently, was talking MPG. Folks yammering about how a 6 pack will run with a well tuned 750-950 single 4 is total BS. They DON'T

So what about stock or SS.

It's the tune up that is the problem with his set up, I'd almost guarantee that.
Carry on.