My AVS carbs are the slightly later 2 screw design but the info below may be of some help.

http://www.forabodiesonly.com/mopar/showthread.php?t=50847

http://www.forabodiesonly.com/mopar/showthread.php?t=29582

and here's a link to how I converted my Carter AVS to annular boosters

http://www.mymopar.com/forums/index.php?showtopic=9065