I am running two 9755S federal mogul AFB's 750 cfm, yes they are converted to dual feed. The needles and seats also have windows cut into them. I also extended the primary boosters as was discussed on a thread a while back. I trimmed the secondary weights down to 102 grams. I used the velocity probe on my flow bench with a brass rod soldered into a jet so I could see what each booster pulled on the bench. With the stock booster they pulled 194 to 198 feet per second at 10 inches of water, with the extended boosters they pulled 220 to 229 feet per second.
The intake is a victor jr. for max wedge ports that I fabricated a top for, and made some dams in the inside. It is 3 tenths faster than a 1964 factory cross ram, with no other changes. Never had the old cross ram on a dyno.