Single or Dual plane?

I sold my AirGap after bench flowing against the M1 single plane,I also run a AED850HO carb(930cfm)4500 stall.My best is 1.56 60ft 11.20@118mph with my 408(410) http://www.forabodiesonly.com/mopar/video.php?do=viewdetails&videoid=70