For sale a slightly used after rebuilt Carter AFB 400 cfm carb, I tried it on my Rover and just couldn't get it where I wanted it so I changed to a 500 cfm jetted backwards. Perhaps you have more knowledge than me and can fit to your build. Stamped DC 4331S, originally from a "1966 - 67 Buick 340 4055S, 4056S, 4061S, 4331S, 4332S, 4344S Carter AFB"
Asking $90 or make me an offer. Send me a message if interested. Thanks!
(http://i306.photobucket.com/albums/nn277/mabie1978/100_2582.jpg)
Sold, thanks!