Great question. No I have not had it flowed, the Duster was purchased from a FABO memeber, the changes I have made to the strocker are the MSD, better linkages as second Holley was only opening 1/2 way, better fillters and a tune.
Googled STR 1-2 and found these images, no flow figures
Very open plenmum, I do remember reading about some mods on them, I have been unsuccessful finding it again.