bsdds

I have E-code 1957 T-Bird and received car with 9510AB in the front position(closest to front of car) and 9510AA in the rear position. Does the 9510 AA sit in the front position, closest to front of car? Which jet goes into the 9510AA carb (the 45 or the 55)? I just sent both carbs to Holley for overhaul.